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裂纹动态扩展的边界元模拟

Keywords: 时域边界元法,裂纹,动态扩展,二分法

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Abstract:

采用时域边界元法对动态载荷作用下材料中裂纹的快速扩展过程进行数值模拟.计算中,裂纹动态扩展方向根据最大周向应力准则确定,扩展瞬时速度基于二分法迭代确定.在每个扩展时间步,通过在运动裂尖添加新的裂纹单元来模拟裂纹扩展.算例与实验及数值结果进行对比,验证了该方法的准确性.

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