Plastic instability: Criteria and computational approaches
Plastic instability: Criteria and computational approaches
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塑性不稳定性：标准和计算方法
DOI：
10.1007/bf03020127
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发表时间：
1997
影响因子：
9.7
通讯作者：
H. Petryk
中科院分区：
文献类型：
--
作者：
H. Petryk
综述了非时变弹塑性固体失稳的一般判据及其计算方法。从动态失稳、几何失稳或材料失稳的角度讨论了平衡失稳与变形过程失稳的区别。对分岔法、能量法和初始缺陷法进行了比较。与屈服面顶点的形成有关的本构律的增量非线性对不稳定性预测的影响进行了研究。介绍了后批判分析方法的概况。
SummaryGeneral criteria of instability in time-independent elastic-plastic solids and the related computational approaches are reviewed. The distinction between instability of equilibrium and instability of a deformation process is discussed with reference to instabilities of dynamic, geometric or material type. Comparison is made between the bifurcation, energy and initial imperfection approaches. The effect of incremental nonlinearity of the constitutive law, associated with formation of a yield-surface vertex, on instability predictions is examined. A survey of the methods of post-critical analysis is presented.