A CRACK IN FUNCTIONALLY GRADIENT MATERIALS UNDER THERMAL-SHOCK

This paper deals with the problem of two bonded semi-infinite function ally gradient material plates with a crack at the interface under ther mal shock loading conditions. All material properties are supposed to be exponentially dependent on the distance from the crack line. By usi ng both the Laplace transform and the Fourier transform, the problem i s reduced to a singular integral equation which is solved numerically. The stress intensity factor versus time for various material constant s is calculated. The results show that by selecting the material const ants appropriately, the stress intensity factor can be lowered substan tially.