Werkstoffe

Interfacial structure greatly affects the mechanical properties of laminated plates. However, the critical material properties that impact the interfacial morphology, appearance, and associated bonding mechanism of explosive welded plates are …

The design of aircraft hydraulic pipeline system is limited by many factors, such as the integrity of aviation structure or narrow installation space, so the limited clamp support position should be considered. This paper studied the frequency …

Given the global lack of effective analysis methods for the impact of design parameter tolerance on performance deviation in the vehicle proof-of-concept stage, it is difficult to decompose performance tolerance to design parameter tolerance. This …

Prefabricated construction is becoming increasingly prevalent, however, it is rarely applied in underground constructions, except for tunnel linings, due to the difficulties that arise in jointing various prefabricated components in underground …

Rescue robots are expected to carry out reconnaissance and dexterity operations in unknown environments comprising unstructured obstacles. Although a wide variety of designs and implementations have been presented within the field of rescue …

Imbalance vibration is a typical failure mode of rotational machines and has significant negative effects on the efficiency, accuracy, and service life of equipment. To automatically reduce the imbalance vibration during the operational process …

The properties of mortars containing waste glass powder (WGP) as a cement substitute for sustainable construction at various high temperatures were investigated. For this purpose, specimens from four mixtures with WGP at various percentage levels …

Large pressure equipment needs to be tested regularly to ensure safe operation; wall-climbing robots can carry the necessary tools to inspect spherical tanks, such as cameras and non-destructive testing equipment. However, a wall-climbing robot …

Engine tests are both costly and time consuming in developing a new internal combustion engine. Therefore, it is of great importance to predict engine characteristics with high accuracy using artificial intelligence. Thus, it is possible to reduce …

The current research of tire aerodynamics mainly focus on the isolated and simplified tread tire. Compared with the real complex pattern tire, the tread pattern structure and deformed profile of a loaded tire has a greatly influence on tire …

With the continuous expansion of the application range of microelectromechanical systems, microdevice forming technology has achieved remarkable results. However, it is challenging to develop new microforming processes that are low cost …

Current research on quadrotor modeling mainly focuses on theoretical analysis methods and experimental methods, which have problems such as weak adaptability to the environment, high test costs, and long durations. Additionally, the PID …

The existing research on SiCp/Al composite machining mainly focuses on the machining parameters or surface morphology. However, the surface quality of SiCp/Al composites with a high volume fraction has not been extensively studied. In this study …

Gear fault diagnosis technologies have received rapid development and been effectively implemented in many engineering applications. However, the various working conditions would degrade the diagnostic performance and make gear fault diagnosis …

Self-sensing concrete materials, also known as smart concretes, are emerging as a promising technological development for the construction industry, where novel materials with the capability of providing information about the structural integrity …

In this study, we evaluated the deformation shape of a balloon-type dielectric elastomer actuator (DEA) that has been prestretched with water pressure. We fabricated the DEA with poly(dimethylsiloxane) (PDMS) as the elastomeric material and carbon …

Double-suction centrifugal pumps have been applied extensively in many areas, and the significance of pressure fluctuations inside these pumps with large power is becoming increasingly important. In this study, a double-suction centrifugal pump …

In older reinforced concrete (RC) buildings, columns are fragile elements that can induce collapse of entire buildings during earthquakes. An accurate assessment of the seismic vulnerability of RC buildings using nonlinear response history …

The present study investigated the resistance of concrete blended with ground granulated blast furnace slag (GGBS) and ferronickel slag (FNS) to cycles of freeze and thaw. The replacement ratio of the binders was 0%, 50 wt% of GGBS and 30 wt% of …

Flaw detection in non-destructive testing, especially for complex signals like ultrasonic data, has thus far relied heavily on the expertise and judgement of trained human inspectors. While automated systems have been used for a long time, these …

XXL-Computed Tomography (XXL-CT) is able to produce large scale volume datasets of scanned objects such as crash tested cars, sea and aircraft containers or cultural heritage objects. The acquired image data consists of volumes of up to and above …

Film quality analysis is of more considerable significance due to its diversified applications in various fields of technology. The present work reports the speckle interferometric analysis of the argon pressure-induced surface roughness …

Cyber technologies are offering new horizons for quality control in manufacturing and safety assurance in-service of physical assets. The line between non-destructive evaluation (NDE) and Industry 4.0 is getting blurred since both are sensory …

Spectral CT can separate basis materials, and thus it can provide information on material characterization and quantification. Such information can benefit various clinical applications. However, the presence of non-ideal effects in X-ray imaging …

The spread of additive technologies from prototyping to manufacturing has made the development of new products possible, but still needs effective methods in order to allow their characterization. In particular, porosity is considered a crucial …

Convolutional neural networks were used for multiclass segmentation in thermal infrared face analysis. The principle is based on existing image-to-image translation approaches, where each pixel in an image is assigned to a class label. We show …

The semi-solid sintering of a novel Ti6Al4V/CoCrMo biomedical composite was investigated for the first time by semi-in situ X-ray computed microtomography. Composite was fabricated by dry mixing 15 vol% CoCrMo reinforcing particles with Ti6Al4V …

Thin-walled tubes and pipes are employed in industries to work under the conditions of high temperature, high pressure, high flow rates and radiation. Due to such stresses and harsh working conditions, tubes lead to sag during operation because of …

Reinforced concrete bridges are iconic parts of modern infrastructure. They are designed for a minimum service life of 100 years. However, environmental factors and/or inappropriate use might cause overload and accelerate the deterioration of …

Recently, Dalvi and co-authors have shown detailed experimental data of adhesion of soft spheres with rough substrates with roughness measured down to almost the atomic scale, finding that the Persson and Tosatti theory gave satisfactory …

The acoustic emission (AE) technique was employed to monitor crack formation in the water-saturated ceramic material subjected to freeze–thaw cycles. The samples with water accessible porosity ranging from 6 to 50 vol% were prepared from the …

The hammering method used by inspectors is generally applied to inspection of looseness of bolted parts. This method entails active sensing through the input of an excitation signal produced by the inspectors, and has the advantage of practical …

This work focuses on the relation between the sphericity and compactness parameters obtained from the exhaustive analysis on the graphite nodules of a spheroidal graphite cast iron sample, in order to propose a methodology with allow establishing …

This paper examines the effect of dispersant and anti-wear additives on fretting wear in lubricated bearing steel contacts. Reciprocating sliding ball-on-flat fretting tests with a stroke length of 50 μm have been carried out on steel-to-steel …

Predicting the leakage rate of seals requires the distribution of the interfacial separation between a surface and the seal to be known. This distribution function can only be obtained reliably with accurate contact mechanics models for the …

I consider fluid flow at the interface between solids with random roughness. For anisotropic roughness, obtained by stretching isotropic roughness in the x-direction by a factor of $$\gamma ^{1/2}$$ γ 1 / 2 and in the y-direction with a factor of …

The thermo-oxidative degradation of a multiply-alkylated cyclopentane (MAC) lubricant for space applications is investigated. Accelerated aging tests at temperature levels between 60 °C and 150 °C are performed and the aging behavior is …

In some industrial situations, components are subject to repetitive impact in the presence of a slurry. A novel repetitive impact-with-slurry test rig was developed to evaluate the behaviour of a wide range of engineering materials in such …

We study the nominal (ensemble averaged) contact pressure p(x) acting on a cylinder squeezed in contact with an elastic half space with random surface roughness. The contact pressure is Hertzian-like for $$\alpha < 0.01$$ α < 0.01 and …

Construction of drilled shafts for transportation infrastructure presents quality assurance challenges related to structural anomalies, including voids and degraded concrete. Efforts to evaluate anomalies often use stress-wave non-destructive …

Graphene oxide (GO) was incorporated into polyvinyl alcohol (PVA) hydrogel to improve its mechanical and tribological performances for potential articular cartilage replacement application. The compressive mechanical properties, creep resistance …

The frictional properties of ZDDP tribofilms at low entrainment speeds in boundary lubrication conditions have been studied in both rolling/sliding and pure sliding contacts. It has been found that the boundary friction coefficients of these …

Graphene is a good candidate for solid lubricants due to its unique atomic structure. Its lubrication properties are sensitive to chemical modifications such as hydrogenations. Here, an investigation on the lubrication behavior of hydrogenated …

Ab-initio based benchmarking and improvements of molecular mechanics models for organic friction modifier (OFM) additives used in lubricants are presented. We found the generalized amber force field (GAFF2) appears well suited to model oil-steel …

According to statistics, transportation accounts for 19% and 23% of global energy consumption and greenhouse gas emissions each year [ 1 – 3 ]. Lubricant additive is an important means to improve equipment reliability, save energy, and reduce …

Reducing friction and wear of machine components is an important research objective from both economic and environmental perspectives. Among various kinds of additives [ 1 – 3 ], zinc dialkyldithiophosphate (ZDDP) attracts a lot of attention as an …

The vibration-based damage identification techniques use changes in modal properties of structures to detect damages. However, the results of these methods are not reliable under noise. Therefore, it is essential to clarify which method performs …

Structural health monitoring using nonlinear guided waves have found to be of great importance. The detection of micro/fatigue cracks in the early stage is essential to avoid catastrophic failures. This paper presents a defect localization …

The objective of this study was to evaluate the influence of adhesive layer thickness on wear damage of the bonded interface between enamel and composite inlays using self-adhesive resin cement. Sixty bonded interface samples consisting of four …

In the present study, a facile and easily accessible method for obtaining copper-containing nanomaterials by thermolysis of copper cinnamate complex with 4′-phenyl-2,2′:6′,2″-terpyridine at 300 °C was developed. The obtained nanomaterials were …

We investigate the underlying tribological mechanisms and running-in process of a semi-crystalline polymer using molecular-dynamics simulations. We subject a slab of simulated polyvinyl alcohol to a sliding contact asperity resembling a friction …

Sliding wear tests of a titanium-matrix composite (TMC) against M35 steel were performed at room temperature. To improve the wear performance of the TMC, an attempt was made to induce a protective tribofilm by artificially supplying nanoscale …

Synthetic MSH can solve the shortcomings of natural, self-repairing serpentine materials, but its tribological properties are not ideal. Herein, Ni was selected as an accelerant to prepare MSH/Ni composite powder to obtain better friction …

The accurate estimation of real contact area plays an important role in predicting the mechanical contact situation and associated electrical contact resistance for engineering rough surfaces. In this work, an improved peak identification method …

This work reports on the development of pastes containing Ti, TiC, Si, and C elementary powders for in situ synthesis of Ti3SiC2 via screen printing. Four paste compositions were manufactured using two powder mixtures (Ti/Si/C and Ti/TiC/Si/C) …

Scanning electron microscopy shows that the microstructure, in particular the overall grain size, of chemical vapor deposited silicon carbide coatings depends on the deposition temperature. So far, the influence of the microstructure on the …

Lead-free Na0.5Bi0.5TiO3 (NBT) ceramics were prepared via a conventional oxide-mixed sintering route and their electrical transport properties were investigated. Direct current (DC, σDC) and alternating current (AC, σAC) electrical conductivity …

Silicon nitride foams with a hierarchical porous structure was formed by the combination of protein-based gelcasting, chemical vapor infiltration, and in-situ growth of silicon nitride nanowires. The porosity of the foams can be controlled at …

The paper introduces a model of dielectric breakdown strength. The model integrated thermal breakdown and defect models, representing the relationship between the electric field of ferroelectric films and dimensional parameters and operating …

High performance hydroxyapatite (HA) ceramics with excellent densification and mechanical properties were successfully fabricated by digital light processing (DLP) three-dimensional (3D) printing technology. It was found that the sintering …

The effect of the addition of cassava thermoplastic starch on the general properties and the photodegradation behavior of poly(L-lactic acid) (PLLA) was evaluated by blending PLLA with TPS in different weight percentages (5, 10, 15, 20 and 25 …

A novel class of clickable perfluorocyclobutyl (PFCB) aryl ether polymers containing azido groups (APFCB polymers) is reported. The thermal cyclopolymerization reaction of 2-methyl-1,4-bis(1,2,2-trifluorovinyloxy)benzene was first optimized by …

We investigate the mechanical behavior of polypropylene/silica composites under mode I and II loading by using molecular dynamics simulations, focusing on the effects of two typical surface coupling agents of HMDZ and APTES on the interface …

The addition of magnetic nanoparticles gives unique properties to hydrogels. Magnetic-sensitive gels have various applications in targeted drug delivery, separation, and sensing. One of the most advantageous aspects of using magnetic nanoparticles …

Two liquid crystalline epoxy (LCE) resins containing different mesogenic lengths were synthesized and cured with two different aromatic diamine curing agents, diaminodiphenylsulfone (DDS) and diaminodiphenylmethane (DDM) to prepare high …

The effects of dynamic vulcanization systems including sulfur, peroxide, and sulfur/peroxide mixed vulcanization were investigated for dynamically-vulcanized blends of polylactic acid (PLA) and natural rubber (NR) at the PLA/NR ratio of 85/15. For …

Antibacterial gauze is commonly used to prevent wound inflammation and infection. In this study, a novel antibacterial gauze was prepared using antimicrobial peptides and silver nanoparticles, achieving a wide antimicrobial spectrum and increased …

To research the role of mandrel rotation speed on the morphology and mechanical properties of polypropylene (PP) pipes, a self-made rotational shear system (RSS) was applied in this study to manufacture plastic pipes with improved hoop tensile …

Synthesis of poly(α-methyl β-alanine)-poly(ε-caprolactone) [PmBA-(PCL)2] tri arm star polymer was accomplished by "click" chemistry. For this purpose, poly(α-methyl β-alanine) (PmBA) was synthesized from methacrylamide by hydrogen transfer …

The coating of the fibrous skeleton of luffa cylindrica (LC) with polyaniline (PANI) was carried out by in-situ polymerization of aniline. A thin PANI layer in its emeraldine-salt form (ES) got bound on to the LC surface, as revealed by the green …

This paper reports the development of a novel photocurable carbon fiber/polyether-polythioether (TF CFEC) composite and the comparison of its mechanical performance with that of a conventional thermally cured carbon fiber-epoxi composite (CTC …

A novel diamine (3,6-CAPDA) bearing carbazole and amide group was prepared. On the basis of 3,6-CAPDA and pyromellitic dianhydride (PMDA), a high-barrier polyimide (3,6-CAPPI) was obtained through a two-step polymerization method. The 3,6-CAPPI …

The pressure-assisted photopolymerization in the fullerene complex with ferrocene C60·{Fe(C5H5)2}2 was studied for the first time by simultaneous in-situ Raman and X-ray diffraction (XRD) techniques at pressures up to 8 GPa. The irreversible …

Molecularly imprinted polymers (MIP) are known as high selective sorbent, however, its application in aqueous medium is very limiting. In this way, a new hybrid MIP was successfully synthesized for saccharin (SAC) extraction in aqueous medium. SAC …

Epoxy (EP) composites were intended with polydopamine modified titanate whiskers for mechanical improvement. The EP composites exhibited distinct morphology, and also demonstrated enhanced interfacial properties generated by functional groups on …

In this research, thermally conductive polyamide 6/hexagonal boron nitride (PA6/hBN) nanocomposites waaere fabricated via an in-situ ring-opening polymerization of ε-caprolactam. The hBN filler was exfoliated through a co-solvent exfoliation …

Nanocomposites and silver nanocomposite coatings based on a copolymer of 1-vinyl-1,2,4-triazole and acrylic acid were synthesized in an aqueous and aqueous-ethanol medium on pure iron and steel electrodes by the electrochemical method. The …

Molecular dynamics simulation were employed to investigate the effect of changing the potential energies describing primary and secondary bonds on the Young’s modulus of a polymer. The energies were changed by arbitrarily modifying the parameters …

Laser 3D printing is the technology of additive manufacturing of models, prototypes and products from liquid photocuring compositions. The method is based on the irradiation of a liquid photopolymer mixture with a laser radiation to create digital …

The surface properties, mechanical characteristics, and morphology of the PP/CPA-Fe composite based on a polymer blend of polypropylene (PP) and copolyamide (CPA) filled with dispersed iron (Fe) were studied. The effect of stepwise behavior of the …

Thiol-functionalized organosilica particles with bowl-like or golf ball-like morphology were successfully obtained through a facile sol–gel procedure. 3-mercaptopropyltrimethoxysilane (MPTMS) and tetraethoxysilane (TEOS) were copolymerized under …

Starch-g-polyacrylamide copolymer and its nanocomposite with Fe3O4 and graphene oxide have been successfully synthesized. The synthesized samples were characterized using FTIR, XRD, SEM, HRTEM, and VSM. The factors that affect the adsorption …

In this study, a pH-sensing electrospun mat containing purple cabbage (PC) (Brassica oleracea) anthocyanins was developed for wound dressing application. The pH-sensing electrospun mat was prepared from sodium alginate (Alg) and poly (vinyl …

Isoindigo (IID) has been developed as an electron deficient moiety for high-performance conjugated organic materials, especially for constituting donor–acceptor (D-A) type conjugated polymers. To further enhance the planarity of IID unit to …

Finite-amplitude free-surface flow in a wedge container is investigated analytically. We study a motionless standing wave of pure potential-flow acceleration with maximal amplitude where its right-angle surface peak falls from rest. The nonlinear …

We model shallow-water waves using a one-dimensional Korteweg–de Vries equation with the wave generation parameterized by random wave amplitudes for a predefined sea state. These wave amplitudes define the high-dimensional stochastic input vector …

The cheaper and easy to handle catalysts are particularly important for catalytic studies. Herein, inexpensive Co2O3 and MnO2 were used as catalysts for the ring-opening polymerization (ROP) of rac-lactide (rac-LA) and ε-caprolactone (ε-CL). The …

In this research paper, the diffraction of a Griffith crack, situated in an infinite strip of finite thickness, due to magnetoelastic shear wave propagation has been analyzed. The effect of magnetic field on the Griffith crack interaction has been …

Water wave scattering by two asymmetric thin elastic plates with arbitrary inclinations is investigated using integral equations. The plates are submerged in finite depth water. The assumption of Euler–Bernoulli beam model for the plates, the use …

Polyacrylonitrile copolymer (PAN) fiber and PAN/lignin (PL) fiber were wet spun from the PAN copolymer solution and PAN/Lignin blend solution using dimethyl sulphoxide (DMSO) solvent. A blend of 90% by weight (wt %) PAN terpolymer and 10wt% lignin …

The benefit of using alkali-treated hemp fibre as the reinforcement for rotationally moulded polyethylene composites was evaluated in this research. Untreated and alkali-treated hemp fibre were characterised using different techniques such as …

Polymer nanocomposite films were formed from the aqueous dispersion of thermally linking styrene-acrylic copolymer (Tubifast 4010®, CHT), partially esterified melamine resin (Tubifix®, CHT), and ZnO nanoparticles as filler. The developed …

A series of amphiphilic acrylate block copolymer (ABC) modified epoxy were prepared by the solution casting method. The mechanical strength, thermal stability, and light transmittance of the modified epoxies were characterized, and the fracture …

Door system plays a very important role in the domain of automobile passive safety. In order to improve its side crashworthiness, some affiliated impact components are assembled. Conventional impact parts can make the door system possess enough …

In this work, SiO2 nanoparticle–embedded polyurethane superhydrophobic coating on aluminium substrate was fabricated using spin coating technique. By embedding SiO2 nanoparticles into the polyurethane matrix, superhydrophobicity is successfully …

In accordance with the vibration characteristics of ball screw feed systems, a hybrid modeling method is proposed to study its dynamic behavior. Partially, the ball screw is modeled as a continuous body, and the remaining components are considered …

We exploited a unique porous structure of the nano-covalent triazine polymer (NCTP) containing aggregation-induced emission (AIE) group to achieve controlled release and drug tracking in tumor acidic microenvironment. NCTP was synthesized by the …

This study examined students’ genetics learning in a game-based environment by exploring the connections between the expectancy-value theory of achievement motivation and flow theory. A total of 394 secondary school students were recruited and …

The optical and optoelectronic characteristics of SnS nanosheets with strong anisotropic crystal structure are researched. Transmission electron microscopy and polarized Raman spectra are used to determine the crystal orientation of SnS …

Graphene quantum dots (GQDs), have unique quantum confinement effects, tunable bandgap and luminescence property, with a wide range of potential applications such as optoelectronic and biomedical areas. However, GQDs usually have a strong tendency …

In this paper, we propose to use time-domain transient analysis to compute the response of structures in a wide frequency band by means of Fourier transform. A time-domain adjoint variable method is then developed to carry out the sensitivity …

Besides chemical composition, microstructure plays a key role to control the properties of engineering materials. A strong correlation exists between microstructure and many mechanical and physical properties of a metal. It has the utmost …

Deflection of the steel I-sections is an important phenomenon that needs to be taken into account to ensure that the serviceability limit state criteria of the Australian Standards are met. The method that is widely used to calculate the …

As people pay more and more attention to environmental protection and the high cost of diesel and gasoline, in order to reduce environmental pollution and use cost, some low-pollution and low-cost components, such as alcohols (ethanol, etc.) and …

This article presents a novel hybrid control scheme for speed control of Brushless DC (BLDC) motor by simultaneously controlling BLDC motor reference current and inverter DC bus voltage. A fractional-order PID (FOPID) controller is employed to …

The turbulent counter-flow flame (TCF) has proven to be a useful benchmark to study turbulence-chemistry interactions, however, the widely observed bulk flow fluctuations and their influence on the flame stability remain unclear. In the present …

The electro-mechanical coupling behaviors of ferroelectric devices with interdigital electrodes may become complicated due to the material inhomogeneity and local field concentration under the complex working conditions. In this paper, a …

This paper is aiming at modifying the global energy storage functional proposed by Wu [ 1 ] for the phase field method so that Newton’s method can be used for energy minimization. The phase field method is an energy-based approach to represent …

Breakthrough curves of N2, O2, and Ar on Silver exchanged titanosilicates (Ag-ETS-10) extrudates and granules were measured using a laboratory scale dynamic column breakthrough (DCB) apparatus. In order to investigate the dynamics of the mass …

This paper shows the development of a displacement potential function based on the Galerkin potential using complex variables. The displacement potential function results in a more suitable method for numerical calculations since it avoids the …

In this paper, we consider environmental boundaries that can be represented by a time-varying closed curve. We use n robots equipped with location sensors to sample the dynamic boundary. The main difficulty during the prediction process is that …

Polydopamine (PDA) functionalized graphitic carbon nitride nanosheets (PDCN) and α-Fe2O3 nanoparticles (PDFe) were synthesized and characterized by FT-IR, XRD, TGA, XPS, and TEM. The complementary fillers of two-dimensional PDCN and …

Lanthanum orthophosphate (LaPO4) and La0.95−xCe0.05MnxPO4 (x = 0.00, 0.03, 0.10) phosphors were synthesized by a simple and cost-efficient co-precipitation method and the formation of LaPO4 nanorods with a monoclinic P21/n crystal structure was …

The optical, structural and electrical behavior of thin films has been a highly important topic in scientific works and technological applications for many years. Because of this importance, the characteristic behaviors of the film forms are …

Pure α-MnO2 materials with interconnected nanowires in an urchin shape were synthesized by a green synthesis method. Purified extracts of cinnamon and moringa were used as benign and economical reducing agents to synthesize C-MnO2 and M-MnO2 …

The charge reservoir layer plays a crucial role in the charge transfer mechanism in high-temperature superconductors. The effect of reducing the thickness of the Cu0.5Tl0.5Ba2O4−δ charge reservoir by replacing Ba with Mg atom in Cu0.5Tl0.5-1223 …

ZnO films (5 nm and 20 nm) have been grown on GaN single-crystal substrates by thermal atomic layer deposition (ALD) and the electrical properties of n-GaN Schottky contacts modified by such ultrathin ZnO films have been characterized. Compared …

In this work, we propose a simple method to characterize the broadband absorption of different sizes of iron (Fe) nanoparticles. The absorption feature in the Ku-band (14–18 GHz) of paint/Fe nanocomposites with different Fe concentration is …

Electrocatalytic hydrogen evolution reaction (HER) is a highly potential strategy to massively produce green hydrogen fuels. However, the employment of costly Pt-based electrocatalyst in the cathode of electrolyzer greatly hampers the development …

The torque transfer capability as well as long-term endurance are essential for wet multi-plate clutches. The quality of the torque transmission process largely depends on the tribological system consisting of friction pairing, lubricant and …

The twinning mechanism of Al solid solutions is comprehensively investigated via the first-principles method. The relative stability of C and H atoms at tetrahedral and octahedral centers is discussed. Moreover, the interaction energies between …

A computational model describing crack formation in a fibrous composite is developed. It is assumed that, upon repeated loading, crack formation in the composite leads to its fracture. Determination of the unknown parameters characterizing an …

A generalized theory of nonlocal elasticity is elaborated. The proposed integral type nonlocal formulation is based on attenuation functions being assumed as the convolution product of n first order (Eringen type) kernels. The theory stems from a …

With growing concerns about the finite resources and the environmental impact of the building industry, synthetic reinforcements are being substituted by the lignocellulose fibers due to their sustainable, low cost, non-toxic, lightweight, and …

Using the first-principles method, the structural, electronic, optical and mechanical properties of the vertical and lateral heterostructures based on the boron phosphide (BP) and GaN monolayers, named V-GaN@BP and L-GaN@BP, are investigated …

Ni-based single-crystal superalloys (SXs) are used to manufacture turbine blades, which operate at temperatures above 1000 °C. They have to withstand a load spectrum, which includes creep, thermal fatigue and hot corrosion. Creep strength, the …

Control of Ag electro chemical migration is crucial for long–term reliability of electrical components in high–voltage applications. In this work, Cu was bonded onto an AlN substrate at temperatures between 650 °C and 950 °C for 1 h using a Ag …

The ω-phase in metastable β-titanium (Ti) alloys attracts great research interests owing to the metastability and the involved microstructural complexity upon straining, while the fundamental understanding on its formation mechanism is still …

Local curvatures have a profound influence on sintered microstructure. Here, using phase-field simulations, particle curvature effects were phenomenologically investigated by using geometrical configurations of two, three, and four particles, and …

Gd–chelate magnetic resonance imaging (MRI) contrast agents used in conventional clinical medicine still have some shortcomings, such as their low relaxation rates and poor imaging sensitivity. In this work, a Gd–chelate (Gd–DTPA), with a …

The development of non-precious metal catalysts with high efficiency and superior reaction durability for oxygen reduction reaction (ORR) is of great importance for construction of next-generation fuel cells. Herein, we report the preparation of …

The samples of polycrystalline cobalt were strained in tension in the second stage of work hardening in order to activate twinning. The identification of twins and their orientation was analyzed using electron backscatter diffraction. The study of …

Soft biological tissues compromise diverse cell types and extracellular matrix constituents, each of which can possess individual natural configurations, material properties, and rates of turnover. For this reason, mixture-based models of growth …

Drilling using quasi-continuous wave (QCW) millisecond pulse fibre laser is the state-of-the-art for producing film-cooling holes over uncoated aero-engine components. Laser drilling of coated components, including thermal barrier coated (TBC) …

In processing of metallic material by ultrasonic nanocrystalline surface modification (UNSM), obtaining high quality sample with desired surface property needs a careful control on processing factors. The condition would be more critical when the …

Self-pierce riveting (SPR) is a major joining method used in the automotive industry. However, there still lacks a fast and easy-to-use joint quality prediction tool available for the automotive engineers. In this study, the simple but effective …

Titanium alloy parts with a large inclined angle and thin-walled group holes exhibit low machining efficiency, poor position accuracy, and difficulties in the manufacturing of small gap grouped graphite electrodes. To achieve the high-efficiency …

Due to the low stiffness of the thin-walled part, the larger deformation error occurs in the milling process, and the machining precision and quality cannot be satisfied. Previous studies of the tool path generation methods for the deformation …

In order to study the behavior of Steel-concrete composite beams with different shear connection degrees, using finite element software ABAQUS, four models with different numbers of headed studs are established, all of which apply appropriate …

In orthotropic steel decks (OSDs), the rib-to-crossbeam joint is the most vulnerable detail that has not been drawn enough attention. The failure mode of cracks initiate from the lower weld end on rib wall is governing its fatigue performance.

It is widely accepted that microstructural features such as grain boundaries (GBs) play a significant role in the macroscopic plastic response of polycrystalline metals [ 1 , 2 ]. Some grain boundaries act as barriers, blocking slip and resulting …

Two-dimensional digital image correlation (2D-DIC) is a simple and easy-to-implement image-based optical technique for full-field surface displacement and strain measurement of planar objects [ 1 – 3 ]. As surface strains of a sheet sample in …

Reliable relationships between the low-cost indentation measurements (e.g., hardness, instrumented indentation) and the much more expensive but standardized protocols for the measurements of tensile yield strengths of metals and alloys are of …

The safety of drinking water had been given significant attention because of its direct influence on human health. Nitrate pollution in groundwater has been reported by many countries and organizations as a topic of significant interest. Nitrate …

Defect engineering is playing an extraordinary role in tuning a wide range of physical and chemical properties of transition-metal oxides, especially the controllable formation and accurate discrimination of oxygen vacancies (V _O s), which is …

g–C3N4 nanosheets with porous structures (labelled PGN) were prepared by an extremely facile one-step, template-free method. The method used to prepare porous g–C3N4 nanosheets in this research was thermal polycondensation of urea pre-treated with …

Mn-doped perovskite CsPb(Cl/Br)3 nanocrystals (NCs) have been widely explored due to their unique dual-color emission characteristics, which could reduce the usage of toxic Pb and introduce the exciton emission in blue region and the stable Mn2+ …

The kinetics mismatch between battery type anode and capacitor type cathode for most lithium-ion capacitors (LICs) greatly hampers their overall electrochemical performance. Herein, we construct a high-performance LIC using activated carbon as …

In this work, we design a novel ultra-light graphene/carbon nanofibers/carbon nanotube aerogels (GCNAs) with excellent thermal insulating and hot oil adsorption ability. The GCNAs is prepared by a facile freeze-drying method followed by …

In this work, drain current ID for 3 nm gate length of triple material (TM) double surrounding gate (DSG) inversion mode (IM) and junctionless (JL) Si nanotube (SiNT) MOSFET has been studied and simulation results are reported using Silvaco ATLAS …

We derive here a fundamental solution for the harmonic vibration of thick asymmetrically laminated composite plates. The kinematics of the plate is based on Reddy’s third-order shear deformation theory (J Appl Mech 51:745–752, 1984). The …

Vibration chains are of interest in many fields of practical applications. In this contribution, a modal analysis of the rather special Mikota’s vibration chain is performed. Herein, focus is set on the mode shapes of this multibody oscillator …

A stabilized finite element framework for high-speed compressible flows is presented. The Streamline-Upwind/Petrov–Galerkin formulation augmented with discontinuity-capturing (DC) are the main constituents of the framework that enable accurate …

This paper reports the synthesis of a mixed ligand nickel complexes as an emissive layer in organic light emitting diode applications. Synthesized ligand and nickel complexes were characterized by Fourier transform infrared spectroscopy, 1H …

Lightweight and high-strength materials with high electromagnetic interference shielding performance are the best solution for electromagnetic pollution. However, the MXene film with extremely high electromagnetic interference shielding …

The anomalous precipitation behavior of Ag3Sn phase in Sn-3.5Ag lead-free solder joints during liquid–solid electromigration at 1.0 × 104 A/cm2 has been observed using a real-time imaging method with synchrotron radiation. Large Ag3Sn phases …

Abrasive waterjet machining was an effective method for cutting CFRP materials in various industries, while machining defects are inevitably observed especially for thick CFRP laminates due to the inherent characteristics of waterjet. In this …

To increase the usage of high-strength steel and aluminium alloy sheets for lightweight automobile body panels, the joinability of sheet combinations including a 780-MPa high-strength steel and an aluminium alloy A5052 sheets by mechanical …

The thermal characteristics of spindles have a significant influence on the workpiece quality. This paper proposes a novel real-time thermal characteristic modelling approach for spindles based on the bond graph method, with simplified thermal …

The shape curve of continuous variable crown (CVC) roll applied in plate rolling process is usually adopted as cubic curves or quintic curves, but the coupling between quadratic crown and quartic crown of conventional CVC roll shape curve could …

To study the wear mechanism of micro-tools that cut superalloy materials, a single-crystal nickel-based superalloy DD98 was micro-milled by a cemented carbide milling tool with a 0.6-mm diameter, and the wear standard for the micro-milling tool …

Engineering design processes that are dependent on Computer-Aided Engineering (CAE) tools commonly involve complex patterns of tasks, including concurrency and intertwined iterations. There are often inefficiencies and improvement opportunities in …

A novel multi-functional superabsorbent polymer (SAP) of carboxymethyl cellulose sodium grafted polyacrylic acid/semi-coke (CMC-g-PAA/SC) was firstly prepared by grafting acrylic acid (AA) onto the carboxymethyl cellulose sodium (CMC) using …

Management of magnetic properties of polymer without changing its chemical formation is the main challenge in polymer engineering and science. In the current study, the innovative three-dimensional hybrid polymerized material was prepared through …

A couple of models were established to investigate the effects of welding parameters (voltage, wire feed speed, and welding speed) on the resultant mechanical properties of welding bead and welding heat input on the basis of a Box-Behnken …

Compared to the intuitionistic fuzzy sets, the Pythagorean fuzzy sets (PFSs) can provide the decision makers with more freedom to express their evaluation information. There exist some research results on the correlation coefficient between PFSs …

During past few decades, fuzzy decision is an important attention in the areas of science, engineering, economic system, business, etc. To solve day-to-day problem, researchers use fuzzy data in transportation problem for presenting the …

Selective maintenance problem plays an essential role in reliability optimization decision-making problems. Systems are a configuration of several components, and there are situations the system needs small intervals or break for maintenance …

The increasing issues on inflammable, explosive and toxic gases with the developments of industries have been focused in recent years. Owing to low cost, fast response and facile operation, gas sensors built with metal oxide semiconductors have …

There are increasing demands for environmental monitoring, air quality control, medical diagnostics, explosions and toxic gas detection, as well as for high-performance gas sensors [ 1 – 6 ]. It is well known that high sensitivity, rapid response …

Novel methodology to estimate the shape memory behavior of smart structure fabricated by additive manufacturing is presented by merging 3D laser scanning and reverse engineering (RE). The specimens made from a temperature-stimulated smart …

The goal of this study was to use natural phosphate (NP) abundant in Algeria, as an adsorbent for the removal of uranium (VI) from aqueous solutions in batch adsorption. A full 23 factorial extended experimental design was investigated. The …

Accurate pore pressure knowledge is particularly critical in drilling, such as drilling safety (avoidance of blowouts and well control lost-time incidents). Pore pressure prediction in carbonate reservoir due to the fact that the pore system and …

Multiple sclerosis (MS) is a chronic inflammatory autoimmune disease, which leads to neurodegenerative processes that cause neuron demyelination. MS is multifactorial with uncertain etiology, where interactions between genetic makeup of an …

Pufferfish skin is known for its spine-covered surface, which differs significantly from that of common fish species. Recent research has shown that such rough surfaces may have potential applicability in saving energy. In order to verify the drag …

Proactive management at mass gatherings is vital to ensure safe crowd evacuation during emergencies. The increasing number of crowd incidents and casualties during the Hajj season is one of the major concerns for authorities in Saudi Arabia. This …

Al-18%Si-4.5%Cu alloy was processed by route BC equal-channel angular pressing (ECAP) at a temperature of 400 °C. Electron backscattered diffraction (EBSD) was used to analyze the microstructure and microtexture during the ECAP process. The …

In past two decades, number of studies has been reported on 3D printing of polyvinylidene fluoride (PVDF) composite matrix. But hitherto, little has been reported on 4D applications of graphene(Gr)-reinforced PVDF for maintenance and repair of …

A sensitive and selective voltammetric sensor was fabricated by incorporating carbon paste into multiwalled carbon nanotubes, followed by drop coating of sodium dodecyl sulfate (SDS), onto the surface in an attempt to find an approachable method …

FB780 steel with a high hole-expanding ratio, as ferrite–bainite dual-phase steel, is an indispensable material to manufacture different automobile parts. In the present study, uniaxial tension tests and metallographic analyses were conducted to …

In this article, formability of aluminum alloy AA5083-sheet in single point incremental forming (SPIF) is investigated through forming limit curves (FLCs) and maximum formable wall angle considering different forming parameters and conditions.

Anisotropy in texture determines capacity of the steel to achieve maximum plastic flow in the plane of the sheet and maximum resistance to flow in a direction perpendicular to the sheet. Present work has been carried out to explore the potential …

We introduce and study the problem of planning a trajectory for an agent to carry out a scouting mission while avoiding being detected by an adversarial opponent. This introduces a multi-objective version of classical visibility-based target …

A non-isothermal vacuum assisted hot-forming process using tailored laminate temperature is introduced. By using process simulation and manufacturing experiments, improved laminate quality is achieved compared to the standard hot-forming process.

Even though sovereign bonds represent low-risk alternatives that give investors a healthy income, the risk assessment process for these bonds is still considered subjective because of the lack of criteria-related information and transparency of …

Mechanical aspects play an important role in brain development, function, and disease. Therefore, continuum-mechanics-based computational models are a valuable tool to advance our understanding of mechanics-related physiological and pathological …

Morphogenesis is regulated by genetic, biochemical, and biomechanical factors, but the feedback controlling the interactions between these factors remains poorly understood. A previous study has found that compressing the brain tube of the early …

Since the pioneering work of Eshelby on a single ellipsoidal inclusion embedded in an infinite space, much attention has been devoted in the literature to the question of the uniformity of the stress field inside inclusions surrounded by an …

The eye grows during childhood to position the retina at the correct distance behind the lens to enable focused vision, a process called emmetropization. Animal studies have demonstrated that this growth process is dependent upon visual stimuli …

Two dissimilar hydrogel layers bonded together become unstable when the compressive stresses due to diffusion-driven swelling of the layers reach a critical point and creases form at the interface. Although creasing instabilities observed on …

Infectious microbes that spread easily in healthcare facilities remain as the severe threat for the public health, especially among immunocompromised populations. Given the intricate problem of dramatic increase in resistance to common biocides …

Developing carbon-based electrocatalysts with excellent N2 adsorption and activation capability holds the key to achieve highly efficient nitrogen reduction reaction (NRR) for reaching its practical application. Here, we report a highly active …

Enhancing the mechanical strength of highly conductive pure metals usually causes significant reduction in their electrical conductivity. For example, introducing phase/matrix interfaces or more grain boundaries, are common and effective methods …

The purpose of the study is to elucidate fiber deformation behavior during the forging of a spur gear by using a carbon fiber reinforced thermoplastic billet. The billet was composed of PA6/UD chips with a fiber length of 30 mm and fiber volume …

Ice formation on solid surfaces may originate serious problems in various fields such as aircraft, electrical lines etc. Hydrophobic coatings and surfaces can have potential applications with anti-icing properties via excessive repellency of …

This investigation reports the synthesis and evaluation of a novel and improved diatomite modified with Fe–Mn binary oxide (DT-FeMn) Fenton catalysis for photochemical reactions in aqueous media. The catalyst was prepared by a co-precipitation …

Poly(butylene succinate) (PBS) is used to produce micro-/nanoporous biodegradable scaffolds, suitable for the release of the mosquito repellent N,N-diethyl-3-methylbenzamide (DEET), based on thermally induced phase separation. For solvent-rich …

In this paper, we consider planar magnetohydrodynamics (MHD) system when the viscous coefficients and heat conductivity depend on specific volume v and temperature ??. For technical reasons, the viscous coefficients and heat conductivity are …

To meet the growing of high energy density for future applications in portable electronic devices and hybrid electric vehicles, achieving increase the specific capacity for the anodes in lithium-ion batteries (LIBs) has become more and more …