Time domain boundary element method for dynamic stress intensity factor computations
Time domain boundary element method for dynamic stress intensity factor computations
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DOI：
10.1002/nme.1620330309
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发表时间：
1992-02
影响因子：
2.9
通讯作者：
J. Domínguez;R. Gallego
中科院分区：
文献类型：
--
作者：
J. Domínguez;R. Gallego
本文提出了一种利用牵引奇异四分之一点边界元结合边界元法的直接时域公式计算瞬态动态应力强度因子的方法。应力强度因子的计算直接从牵引节点值在裂纹尖端。给出了在I型和混合型动态载荷条件下有限域中有限裂纹的几个例子。计算的应力强度因子随时间的变化，并与其他作者使用不同的方法得到的结果进行比较。协议非常好。计算结果可靠，对网格依赖性小。这些事实允许通过简单的边界离散化来分析动态裂纹问题。所提出的通用程序可以很容易地应用于复杂的几何形状，其中包括一个或多个裂纹的问题。
This paper presents a procedure for transient dynamic stress intensity factor computations using traction singular quarter‐point boundary elements in combination with the direct time domain formulation of the Boundary Element Method. The stress intensity factors are computed directly from the traction nodal values at the crack tip. Several examples of finite cracks in finite domains under mode‐I and mixed mode dynamic loading conditions are presented. The computed stress intensity factors are represented versus time and compared with those obtained by other authors using different methods. The agreement is very good. The results are reliable and little mesh dependent. These facts allow for the analysis of dynamic crack problems with simple boundary discretizations. The versatile procedure presented can be easily applied to problems with complex geometry which include one or several cracks.