A gradient‐extended damage‐plasticity model to counteract mesh dependence in finite element simulations
A gradient‐extended damage‐plasticity model to counteract mesh dependence in finite element simulations
复制标题
用于抵消有限元模拟中网格依赖性的梯度扩展损伤塑性模型
DOI：
10.1002/pamm.201710086
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Wulfinghoff
中科院分区：
文献类型：
--
作者：
Brepols;Wulfinghoff
本研究涉及热力学一致梯度扩展损伤塑性模型的理论和数值方面，该模型基于“双表面”方法：原则上，通过使用单独的屈服和损伤标准以及单独的加载/卸载条件集，将损伤和塑性视为独立的物理机制。从实用的角度来看，这样的模型特别有吸引力，因为它可以自然地解释模型行为为（准）脆性、类延性或可能介于两者之间的任何情况的各种情况。模型在局部积分点级别的算法处理需要特殊考虑。在这方面，在研究过程中实施和测试了两种本质上不同的策略，并在此进行简要讨论。数值基准测试表明，所提出的梯度扩展损伤塑性模型非常适合抵消涉及损伤的有限元模拟中结果对网格尺寸的依赖性。 （© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
This study is concerned with theoretical and numerical aspects of a thermodynamically consistent gradient‐extended damage‐plasticity model which is based on a ‘two‐surface’ approach: damage and plasticity are treated as, in principle, independent physical mechanisms by using separate yield and damage criteria as well as individual sets of loading / unloading conditions. Such a model is especially appealing from a practical point of view since it can naturally account for various situations in which the model's behavior is either (quasi‐)brittle‐like, ductile‐like or possibly anything in between. The model's algorithmic treatment at the local integration point level requires special considerations. In this regard, two inherently different strategies are implemented and tested during the study and are briefly discussed here. A numerical benchmark test reveals that the proposed gradient‐extended damage‐plasticity model is well suited for counteracting the results' mesh size dependence in finite element simulations involving damage. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
DOI：
10.1002/cnm.1350
发表时间：
2011-08-01
影响因子：
2.1
作者：
Dimitrijevic, B. J.;Hackl, K.
通讯作者：
Hackl, K.