Crack Extension Based On Abaqus Simulation Software And Applications

At present, in various kinds of engineering problem from mechanical industry, architectural industry and micro-electronic package, etc, cracks will appear because of the material's inherent flaw or the loads forced on the machine or equipment during the process of service. Under some condition, these cracks will propagate, which causes the ultimate failure of the equipment and in some cases, it can cause the accident. Thus, reaching on cracks and its propagation behavior under certain conditions can help prolong the using life of the product, prevent the appearance of the accident. Furthermore, it can contribute to the design of the product and improve the reliability of the design.Based on the present development status of Fracture mechanics theory, Numerical method and FEA software, in this paper we use FEA method to simulate the propagation of the crack. First, we design the program for simulating the propagation of the crack based on the platform of ABAQUS and prove its ability using a computational example. The design thought of the software is as follows: first based on the pre-analysis result make sure if the crack will propagate and obtain the propagation angle, then based on the propagation length ensure the new crack tip and use automatic mesh generation in this area. Through the crack tip area, use the regular quad mesh to ensure the stress, in other areas, use the triangular mesh. Through the circular computation, the crack tip will forward until the structure ruptures or stop cracking. Because of ABAQUS has rich material warehouse, cells, various analysis type and high computational efficiency, we can use this software to analyze elastic-plastic problem, thermal-mechanical problem, machine-electrical problem and multiple crack propagation problem. We have proved the utility and robustness of the software, then analyze some kind of crack propagation problem...