Stress analysis for the field near crack tip of bi-material beam by image distinction of the Isodyne pattern

摘要

Interfacial Fracture Mechanics is the problem which attracted researchers all over the world as the strength of the composite structure are depended on the mechanical behavior of the interfacial fracture. In the paper, the stress field and stress intensity factor of a bi-material beam with crack is obtained by model with initial carrier fringes. In order to obtaining phase value of which is related to the stresses, the Fourier Transform method and frequency shift are applied. It is shown that, using this method, the research of interfacial crack can be more simple, efficient and highly accurate. This technique is very significance for the local three-dimensional effects in dynamic problems of interfacial fracture mechanics.