4.4 Article

Computational lower bound shakedown analysis with limited kinematic hardening is only safe if a specific hardening law is defined

期刊

MECHANICS RESEARCH COMMUNICATIONS
卷 121, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mechrescom.2022.103865

关键词

Limit states; Shakedown analysis; Lower bound approach; Limited kinematic hardening; Nonlinear hardening

向作者/读者索取更多资源

This paper discusses the implications of using unrestricted hardening in lower bound shakedown analysis, highlighting the problem of using a two-surface model in scenarios involving limited kinematic hardening.
Lower bound shakedown analysis is a well accepted and very convenient tool to determine the load bearing capacity of engineering structures subjected to thermo-mechanical loadings. In order to achieve realistic results, limited kinematic hardening needs to be taken into account. In many cases, this is achieved by using two surface models which consider only the initial and the ultimate yield surface. In previous works, I had shown already that the solution obtained from such an approach applied to unrestricted, limited kinematic hardening can appear to be path-dependent. Nonetheless, the two-surface model is still used frequently in the literature for these scenarios. Thus, the aim of this paper is to emphasize the implications from using unrestricted hardening. Most importantly, it should be highlighted that in some cases the obtained result for the shakedown loading factor might not be a lower bound such that it cannot be used in conservative structural design.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据