Macroscopic damage laws based on analysis of microscopic unit cells
Macroscopic damage laws based on analysis of microscopic unit cells
复制标题
基于微观晶胞分析的宏观损伤规律
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
S. Gerke
中科院分区：
文献类型：
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作者：
M. Brünig;Vanessa Hagenbrock;S. Gerke
本文研究了应力状态对韧性金属损伤和断裂行为的影响。本文讨论了一种连续损伤模型，考虑了应力三轴度和矿脉参数对损伤准则和损伤应变演化方程的影响。为了深入了解微观层面上复杂的损伤和失效机制及其对材料样品宏观行为的影响，对含孔洞单胞进行了一系列三维微观力学数值分析，特别关注剪切主导载荷情况。在本分析中，周期性的边界条件已被用来模拟单位细胞的变形行为。数值结果与基于对称边界条件的结果进行了比较。研究结果还被用来建立应力状态相关的损伤准则方程，并提出损伤应变的演化方程，也取决于当前的应力状态。在宏观尺度上的损伤方程的相应的边界条件的影响进行了批判性的讨论。
The paper deals with the influence of the stress state on the damage and fracture behavior of ductile metals. A continuum damage model is discussed taking into account the effect of the stress triaxiality and the Lode parameter on damage criteria and on evolution equations of damage strains. To get insight in the complex damage and failure mechanisms on the micro‐level and their effect on the macroscopic behavior of material samples series of three‐dimensional micro‐mechanical numerical analyses of void containing unit cells have been performed with special focus on shear dominated loading cases. In the present analysis periodic boundary conditions have been used to model the deformation behavior of the unit cells. Numerical results are compared with those based on symmetry boundary conditions. The results are also used to develop equations for stress‐state‐dependent damage criteria and to propose evolution equations of damage strains also depending on the current stress state. The effect of the respective boundary conditions on damage equations on the macro‐scale is critically discussed.
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