A DYNAMIC DOMAIN-INDEPENDENT INTERACTION INTEGRAL METHOD FOR AN INTERFACE CRACK IN NONHOMOGENEOUS MATERIALS

摘要

In order to investigate the dynamic stress intensity factors of an interface crack in nonhomo-geneous materials under dynamic loading, a dynamic domain-independent interaction integral is developed to obtain the dynamic stress intensity factors. The characteristic of do-main-independence is proved rigorously and verified numerically. Some typical examples are discussed. The proposed method can be used to calculate the dynamic stress intensity factors of an interface crack in nonhomogeneous materials efficiently.