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Dynamic Stress Intensity Factors of Mode I Crack Problem for Functionally Graded Layered Structures

Sheng-Hu Ding1,2, Xing Li2, Yue-Ting Zhou2,3
Corresponding author. sjtu2009@163.com
Department of Mathematics and Computer Science, Ningxia University, Yinchuan, 750021, China
LSEC, ICMSEC, Academy of Mathematics and Systems Science, CAS, Beijing 100190, China

Computer Modeling in Engineering & Sciences 2010, 56(1), 43-84. https://doi.org/10.3970/cmes.2010.056.043

Abstract

In this paper, the crack-tip fields in bonded functionally graded finite strips are studied. Different layers may have different nonhomogeneity properties in the structure. A bi-parameter exponential function was introduced to simulate the continuous variation of material properties. The problem was reduced as a system of Cauchy singular integral equations of the first kind by Laplace and Fourier integral transforms. Various internal cracks and edge crack and crack crossing the interface configurations are investigated, respectively. The asymptotic stress field near the tip of a crack crossing the interface is examined and it is shown that, unlike the corresponding stress field in piecewise homogeneous materials, in this case the "kink" in material property at the interface does not introduce any singularity. The influences of geometrical and physical parameters and crack interactions on the dynamic stress intensity factors were illustrated and discussed.

Keywords

Functionally graded layered structures, Collinear cracks, Singular integral equation, Dynamic stress intensity factor

Cite This Article

Ding, S., Li, X., Zhou, Y. (2010). Dynamic Stress Intensity Factors of Mode I Crack Problem for Functionally Graded Layered Structures. CMES-Computer Modeling in Engineering & Sciences, 56(1), 43–84.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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