We analyze homothermal acceleration waves in complex materials (those with active microstructure) in the presence of internal constraints that link the temperature to a manifold-valued phase-field describing a generic material microstructure at a …
verfasst von:
Pasquale Giovine, Paolo Maria Mariano, Federica Mugnaioni
Twin-box decks are prone to vortex-induced vibration (VIV) at moderate wind speeds, and previous studies have shown a complex interplay between the flow and the two parallel box girders. OpenFOAM is used to model the aerodynamic and aeroelastic …
In this paper, an isotropic environment with a static crack under thermal shock is studied using generalized thermoelasticity equations of Chandrasekharaiah–Tzou. The discretization of the governing equations in dimensionless space is done using …
verfasst von:
Vahid Jafari, Mohammad Bagher Nazari, Masoud Mahdizadeh Rokhi
This study, framed within the context of the lower bound theorem of limit analysis, aims to assess the anti-funicular equilibrium of masonry arches and domes using a computational approach based on the constrained force density method. In contrast …
Recent investigations on active materials have introduced a new paradigm for soft robotics by showing that a complex response can be obtained from simple stimuli by harnessing dynamic instabilities. In particular, polyelectrolyte hydrogel …
In this paper, a nonlocal model for porous thermoelasticity is derived in the framework of the Mindlin’s strain gradient theory where the thermal behavior is based on the entropy balance postulated by Green–Naghdi models of type II or III. In this …
In this paper, we consider the linear theory for a model of a thermopiezoelectric nonsimple body as presented in Passarella and Tibullo (Entropy, https://doi.org/10.3390/e24091229 . 2022) in which the second displacement gradient and the second …
The original online version of the article has been updated to improve the placement of the Figures and Tables: 1. Moved Fig. 9 next to Eq. 32 2. Moved Fig. 10 below Table 2. 3. Moved Table 3 above Sect. 5. 4. Moved Fig. 11 below Table 3. 5. Moved …
This paper proposes and analyzes some simplified dynamic modeling methods for parallel robots. The proposed methods are based on a Lagrangian approach where the key concept consists in simplifying the expression of the energy for robots …
In order to adapt to the high speed of a high-speed permanent magnet synchronous motor (HSPMSM) used in hydrogen fuel cells, air foil bearings are applied to support the motor rotor. However, the stability of the motor rotor system supported by …
To address the issues concerning energy conversion efficiency and total energy in the propulsion process of wave energy conversion devices in deep water environments, this study examines the array layout of the existing dual-buoy point-absorption …
Exothermic autocatalytic reaction fronts propagating between two conductive walls shows an increase of speed and change in shape due to buoyancy driven convection. We modeled the system using reaction-diffusion-advection equations for chemical …
The main goal of this paper is to investigate the hydrodynamic and vibrational behavior of the 2000 mm diameter Howell Bunger valve that will be installed in the Khodaafrin dam. The existence of a historical bridge downstream of this dam makes it …
verfasst von:
Hadi Asadzadeh, Amir Ebrahimzadeh, Farid Vakili-Tahami, Morteza Sadeghi
In the present numerical research, the efficiency of perforated and plate trashracks are investigated in reducing the strength of the formed free surface vortices at vertical intakes. Trashracks are installed at the entrance of the intake as means …
verfasst von:
Seyyed Hadi Mousavinia, Hamed Sarkardeh, Ebrahim Jabbari, Amirhossein Taghizadeh
We demonstrate that the internal forces and moments in a shell structure can be described by 4 vectors in 3 dimensional space which could be used to express the equilibrium of a shell graphically. The internal forces and moments described by 2 of …
Fixed bed reactor simulations are often based on a porous media model with a single energy equation for the combined fluid and solid phases. In this energy equation, an effective thermal conductivity (which takes into account both the fluid and …
verfasst von:
Eric A. Daymo, Anna Lee Tonkovich, Matthias Hettel, Akash Shirsath
In his work on stress functions Maxwell noted that given a planar truss the internal force distribution may be described by a piecewise linear, $$C^0$$ C 0 continuous version of the Airy stress function. Later Williams and McRobie proposed that …
Friction is an ever-present force in our lives, affecting the interaction between objects in numerous ways. The common hypothesis of frictionless contact between a foreign rigid object (needle) and a target material during puncturing leads to a …
Under antiplane deformation, the problem of the contact interaction of a thin infinite stringer of finite width with an elastic 3D wedge-shaped body of an arbitrary opening angle is considered. It is assumed that one face of the wedge is rigidly …
The motion of a classical point particle submitted to a central restoring force in a rotating frame is studied. Trajectories taking account all fictitious forces are presented. The obtained solutions are applied to the problems of pendulums …