Unified tensile fracture criterion.
Unified tensile fracture criterion.
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DOI：
10.1103/physrevlett.94.094301
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发表时间：
2005-03
影响因子：
8.6
通讯作者：
Z. Zhang;J. Eckert
中科院分区：
文献类型：
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作者：
Z. Zhang;J. Eckert
我们发现，经典的故障标准，即，最大正应力准则、Tresca准则、Mohr-Coulomb准则和vonMises准则不能很好地解释大块金属玻璃（BMG）材料的拉伸断裂行为。为了更好的描述，我们提出了一个椭圆准则作为一个新的失效准则，以统一上述四个经典准则，并应用它来示例性地描述BMG以及各种其他材料的拉伸断裂行为。根据α = τ（0）/σ（0）比值的不同，本文提出的椭圆准则可以统一各种经典的破坏准则。
We find that the classical failure criteria, i.e., maximum normal stress criterion, Tresca criterion, Mohr-Coulomb criterion, and von Mises criterion, cannot satisfactorily explain the tensile fracture behavior of the bulk metallic glass (BMG) materials. For a better description, we propose an ellipse criterion as a new failure criterion to unify the four classical criteria above and apply it to exemplarily describe the tensile fracture behavior of BMGs as well as a variety of other materials. It is suggested that each of the classical failure criteria can be unified by the present ellipse criterion depending on the difference of the ratio alpha=tau(0)/sigma(0).