Biaxial experiments and numerical simulations on damage and fracture mechanisms in ductile metals at different loading conditions
Biaxial experiments and numerical simulations on damage and fracture mechanisms in ductile metals at different loading conditions
复制标题
不同载荷条件下延性金属损伤和断裂机制的双轴实验和数值模拟
DOI：
10.1016/j.prostr.2016.06.388
复制
发表时间：
2016
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
本文讨论了延性金属的各向异性损伤和断裂模型。唯象方法考虑了应力状态对损伤条件和损伤应变演化规律的影响。根据应力三轴性和Lode参数的不同，这些准则的不同分支被认为对应于不同的损伤和断裂机制。为了验证这些准则，提出了用二维加载试件进行的新实验。详细讨论了试件的几何形状和加载条件以及它们对应力状态的影响。它们允许剪切-拉伸和剪切-压缩应力状态相结合。利用数字图像相关技术对试件临界区的应变场进行了分析。相应的实验数值模拟表明，它们涵盖了广泛的应力状态。
The paper deals with an anisotropic damage and fracture model for ductile metals. The phenomenological approach takes into account the effect of stress state on damage condition and damage strain evolution laws. Different branches of these criteria are considered corresponding to different damage and fracture mechanisms depending on stress triaxiality and the Lode parameter. To validate these criteria new experiments with two-dimensionally loaded specimens are presented. Specimen’s geometry and loading conditions as well as their influence on stress states are discussed in detail. They allow combined shear-tension and shear-compression stress states. Digital image correlation technique has been used to analyze current strain fields in critical regions of the specimens. Corresponding numerical simulations of the experiments show that they cover a wide range of stress states.
影响因子：
9.8
作者：
Bruenig, Michael;Gerke, Steffen;Hagenbrock, Vanessa
通讯作者：
Hagenbrock, Vanessa