Weitere Artikel dieser Ausgabe durch Wischen aufrufen
Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 47, No. 1, pp. 3–16, January-February, 2011.
The long-term performance of engineering structures is typically discussed in terms of such concepts as structural integrity, durability, damage tolerance, fracture toughness, etc. These familiar concepts are usually addressed by considering balance equations, crack growth relationships, constitutive equations with constant material properties, and constant or cyclically applied load conditions. The loading histories are represented by changing stress (or strain) states only. For many situations, especially for those associated with high-performance engineering structures, the local state of the material may also change during service, so that the properties used in the equations are functions of time and history of applied conditions. For example, the local values of stiffness, strength, and conductivity are altered by material degradation to create "property fields" that replace the global constants, and introduce time and history into the governing equations. The present paper will examine a small set of such problems, which involve the accumulation of distributed damage and the development of an eventual fracture path leading to failure. Specifically, the paper discusses this problem in the context of material state changes measured by impedance variations as a method of following the details of fracture path development. An analysis and interpretations of observations will be presented, and limitations and opportunities associated with this general concept will be discussed.
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
K. L. Reifsnider, P. Fazzino, P. K. Majumdar, and L. Xing, “Material state changes as a basis for prognosis in aeronautical structures,” in: The Aeronautical Society (2009), pp. 789–798.
S. Ogihara and K. L. Reifsnider, Appl. Compos. Mater., No. 9, 249–263 (2002).
K. L. Reifsnider, V. Tamuzs, and S. Ogihara, Compos. Sci. Technol., 66, 2473–2478 (2006). CrossRef
C. T. Sun and J. L. Chen, Compos. Mater., 23, 1009–11020 (1989). CrossRef
V. Tamuzs, K. Dzelzitis, and K. L. Reifsnider, Appl. Compos. Mater., 11, No. 5, 281–293 (2004). CrossRef
K. L. Reifsnider and S. Case, Damage Tolerance and Durability of Material Systems, John Wily & Sons, New York (2002).
L. Xing, Progressive Failure of Large Deformation Woven Composites under Dynamic Loading, PhD Thesis, Dep. Mechanical Engineering, College of Engineering, University of Connecticut, (2007).
K. L. Reifsnider and L. Xing, “Large-deformation constitutive theories for structural composites: rate-dependent concepts and effect of microstructure,” Strain, 44, No. 1, 119–125 (2007).
F. C. Monkmann and N. S. Grant, Proc. Am. Soc. Test. Mater., 56, 593–620 (1956).
D. R. Huffner, Progressive Failure of Woven Polymer-Based Composites under Dynamic Loading; Theory and Analytical Simulation, PhD Thesis, College of Engineering, University of Connecticut (2008).
P. Fazzino, Predictive Methods for Large-Scale Progressive Damage in Structural Composites for Aircraft Applications, Masters Thesis, Dep. Mechanical Engineering, College of Engineering and Computing, University of South Carolina (November, 2008).
P. Fazzino and K. L. Reifsnider, “Electrochemical impedance spectroscopy detection of damage in out of plane fatigued fiber reinforced composite materials,” Appl. Compos. Mater., 15, No. 3, 127–138 (2008). CrossRef
- Material state change relationships to fracture path development for large-strain fatigue of composite materials
- Springer US
in-adhesives, MKVS, Zühlke/© Zühlke