Abstract
On basis of introducing the method of solving the dynamic problems, this paper adopts numerical manifold method program to simulate the crack propagation of the off-center crack in the simply supported beam. The result shows that the crack propagation path obtained by the numerical manifold method is very correspondent with the experiment result, that is to say producing the evident curving fracture phenomenon. The failure of the material is the result of mixed propagation of crack mode Ⅰ and Ⅱ, and mode Ⅰ plays a dominant role. At the same time, with the increase of the off-center distance, the stress intensity factor of the crack tip gradually decreases.
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