Experiments and numerical simulation of stress-state-dependent damage in sheet metal forming
Experiments and numerical simulation of stress-state-dependent damage in sheet metal forming
复制标题
板料成形中应力状态相关损伤的实验和数值模拟
DOI：
10.1088/1742-6596/896/1/012077
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
M. Schmidt
中科院分区：
文献类型：
--
作者：
M. Brünig;S. Gerke;M. Schmidt
实验和相应的数值模拟与新的双向加载试样从薄金属板进行了讨论。研究了在不同应力状态下试样的非弹性变形、损伤和断裂行为，分析了延性金属的应力状态相关损伤和失效机制。在试验过程中，利用数字图像相关技术分析了试件临界区域的应变场。相应的数值模拟提供的应力状态在测试标本的信息。结果被用来提出应力状态相关的损伤和故障准则对应于各种损伤机制取决于应力三轴度和矿脉参数。通过一系列新开发试件的双轴实验和相应的数值模拟，验证了这些理论。这表明了新试样的几何形状的效率，涵盖了广泛的应力状态，在剪拉和剪压制度允许验证的应力状态相关的功能的损伤标准和损伤演化规律。
Experiments and corresponding numerical simulations with new biaxially loaded specimens taken from thin metal sheets are discussed. Inelastic deformations as well as damage and fracture behavior of the specimens are investigated under different biaxial loading conditions covering a wide range of stress states to analyze the stress-state-dependent damage and failure mechanisms in ductile metals. During the experiments strain fields in critical regions of the specimens are analyzed by digital image correlation. Corresponding numerical simulations deliver information on stress states in tested specimens. The results are used to propose stress-state-dependent damage and failure criteria corresponding to various damage mechanisms depending on stress triaxiality and the Lode parameter. They are validated by series of biaxial experiments with newly developed specimens and corresponding numerical simulations. This demonstrates the efficiency of the new specimens' geometries covering a wide range of stress states in the shear-tension and shear-compression regime allowing validation of stress-state-dependent functions for the damage criteria and damage evolution laws.
影响因子：
9.8
作者：
Bruenig, Michael;Gerke, Steffen;Hagenbrock, Vanessa
通讯作者：
Hagenbrock, Vanessa