A subsurface eccentric crack in a functionally graded coating layer on the layered half-space under an anti-plane shear impact load

This paper considers a subsurface crack in a functionally graded coating layer on the layered half-space subjected to an anti-plane impact load. The over-coated layer is assumed as a functionally graded material. The second kind Fredholm integral equation is obtained using Laplace transform and Fourier transform. The dynamic stress intensity factors can be obtained through the use of numerical inversion of Laplace transform technique. Numerical results are given for different values of the non-homogeneous parameter, geometric constants and material properties