Micro‐mechanical analyses of the effect of stress triaxiality and the Lode parameter on ductile damage and failure
Micro‐mechanical analyses of the effect of stress triaxiality and the Lode parameter on ductile damage and failure
复制标题
应力三轴度和 Lode 参数对延性损伤和失效影响的微观力学分析
DOI：
10.1002/pamm.201410069
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
M. Brünig
中科院分区：
文献类型：
--
作者：
V. Hagenbrock;S. Gerke;M. Brünig
本文研究了不同应力状态对延性材料塑性变形、损伤和断裂的影响。为了能够对这些效应进行建模，引入了连续损伤模型，并考虑了应力状态对本构方程的依赖性。该模型基于损坏和虚构的未损坏配置的引入。本构方程中出现的所有参数都与应力状态相关，可以用应力强度、应力三轴度和洛德参数来表征。仅靠实验不足以确定所有本构参数。因此，对代表性体积元素进行了一系列额外的三维微机械模拟，以更深入地了解复杂的损伤机制。这些模拟涵盖了拉伸、剪切和压缩域中的各种应力三轴性和 Lode 参数。毕竟，微观机械模拟的结果用于提出损伤方程并确定相应的参数。 （© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
The paper deals with the effect of different stress states on plastic deformations, damage and fracture of ductile materials. To be able to model these effects a continuum damage model has been introduced taking into account the dependence of stress‐state on the constitutive equations. The model is based on the introduction of damaged and fictitious undamaged configurations. All parameters appearing in the constitutive equations are stress‐state‐dependent which can be characterized by the stress intensity, the stress triaxiality and the Lode parameter. Only experiments are not adequate enough to determine all constitutive parameters. Thus, additional series of three‐dimensional micro‐mechanical simulations of representative volume elements have been performed to get more insight in the complex damage mechanisms. These simulations cover a wide range of stress triaxialities and Lode parameters in tension, shear and compression domains. After all, the results from the micro‐mechanical simulations are used to suggest the damage equations and to identify corresponding parameters. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
影响因子：
9.8
作者：
Bruenig, Michael;Gerke, Steffen;Hagenbrock, Vanessa
通讯作者：
Hagenbrock, Vanessa