Reliable J-Values - Numerical Aspects of the Path-Dependence of the J-Integral in Incremental Plasticity
Reliable J-Values - Numerical Aspects of the Path-Dependence of the J-Integral in Incremental Plasticity
复制标题
可靠的 J 值 - 增量塑性中 J 积分路径依赖性的数值方面
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
I. Scheider
中科院分区：
文献类型：
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作者：
W. Brocks;I. Scheider
讨论了弹塑性材料性能有限元法结构分析中可靠j值的确定问题。概述了j积分的理论背景，指出了j积分在弹塑性断裂力学中应用的可能性和局限性，并详细介绍了用有限元法特别是ABAQUS进行计算的方法。特别讨论了增量塑性中的路径依赖问题。结果表明，只有远场值J是唯一定义的，具有物理意义，并且与各自实验标准的结果一致。
The determination of reliable J-values in structural analyses by the finite element method for elastic-plastic material behaviour is addressed. A survey over the theoretical background of the J-integral is given, possibilities and restrictions of application in elastic-plastic fracture mechanics are pointed out, and the calculation by the finite element method with special reference to ABAQUS is addressed in detail. In particular, the problem of path-dependence in incremental plasticity is discussed. It is shown that only a far-field value of J is uniquely defined, physically significant and in accordance with the results of respective experimental standards.