Abstract
By improving the simulation method of contact and contact forces, the function of tracing the propagation of Multi-cracks, the Numerical Manifold Method proposed by Genhua- Shi is developed which can simulate the discontinuity of block system, the tensile or shear failure, and the crack propagation. The least-square method to calculate SIF is presented in this paper for broken cracks. Also the calculation method of contact stiffness matrix is modified. For edge- to-edge contact, correct distribution of contact stress is guaranteed, namely the contact stiffness and contact length make direct proportion. The structure failure problems inducing by crack propagation in different engineering domains are simulated. It shows that the method put forward and the program developed in this paper can effectively simulate the structure failure and can give scientific suggestion for engineering supporting.
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