TY - EJOU AU - Ding, Sheng-Hu AU - Li, Xing AU - Zhou, Yue-Ting TI - Dynamic Stress Intensity Factors of Mode I Crack Problem for Functionally Graded Layered Structures T2 - Computer Modeling in Engineering \& Sciences PY - 2010 VL - 56 IS - 1 SN - 1526-1506 AB - 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. KW - Functionally graded layered structures KW - Collinear cracks KW - Singular integral equation KW - Dynamic stress intensity factor DO - 10.3970/cmes.2010.056.043