Experiments and Numerical Simulations on Stress-State-Dependence of Ductile Damage Criteria
Experiments and Numerical Simulations on Stress-State-Dependence of Ductile Damage Criteria
复制标题
延性损伤准则的应力状态依赖性实验和数值模拟
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
D. Brenner
中科院分区：
文献类型：
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作者：
M. Brünig;S. Gerke;D. Brenner
为了研究应力状态对延性金属损伤行为的影响，本文进行了一系列新的实验和相应的数值模拟。在此背景下，提出了热力学上一致的各向异性连续介质损伤模型。它考虑了应力状态对损伤和破坏条件的影响，以及对损伤应变演化方程的影响。根据应力强度、应力三轴性和Lode参数，相应准则的不同分支被认为对应于不同的损伤和破坏机制。由于不可能仅基于大范围应力状态下的单轴加载试件的试验来提出和验证应力状态相关准则，因此开发了新的二维加载试件的实验。这些实验的相应数值模拟表明，它们涵盖了拉伸域、剪切域和压缩域的广泛的应力三轴性和Lode参数。新的一系列实验允许验证损伤准则的应力状态依赖函数，并用于识别连续介质模型的参数。
The paper deals with a series of new experiments and corresponding numerical simulations to be able to study the effect of stress state on damage behavior of ductile metals. In this context, a thermodynamically consistent anisotropic continuum damage model is presented. It takes into account the effect of stress state on damage and failure conditions as well as on evolution equations of damage strains. Different branches of the respective criteria are considered corresponding to various damage and failure mechanisms depending on stress intensity, stress triaxiality and the Lode parameter. Since it is not possible to propose and to validate stress-state-dependent criteria only based on tests with uniaxially loaded specimens for a wide range of stress states, new experiments with two-dimensionally loaded specimens have been developed. Corresponding numerical simulations of these experiments show that they cover a wide range of stress triaxialities and Lode parameters in the tension, shear and compression domains. The new series of experiments allow validation of stress-state-dependent functions for the damage criteria and are used to identify parameters of the continuum model.
影响因子：
9.8
作者：
Bruenig, Michael;Gerke, Steffen;Hagenbrock, Vanessa
通讯作者：
Hagenbrock, Vanessa
影响因子：
9.8
作者：
Bruenig, Michael;Gerke, Steffen;Hagenbrock, Vanessa
通讯作者：
Hagenbrock, Vanessa