Effects of the stress state on plasticity and ductile failure of an aluminum 5083 alloy
Effects of the stress state on plasticity and ductile failure of an aluminum 5083 alloy
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DOI：
10.1016/j.ijplas.2009.03.006
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发表时间：
2009-12-01
影响因子：
9.8
通讯作者：
Roe, Charles
中科院分区：
文献类型：
--
作者：
Gao, Xiaosheng;Zhang, Tingting;Roe, Charles
本文的实验和数值计算结果表明，应力状态对5083铝合金的塑性响应和韧性断裂行为都有很大的影响。因此，静水应力和应力偏量的第三不变量（与矿脉角有关）需要纳入材料建模。这些发现对经典的J（2）塑性理论提出了挑战，并为建立铝合金结构可靠性评估的应力状态相关塑性和韧性断裂模型提供了蓝图。进一步的研究计划推进，校准和验证新的塑性和韧性断裂模型。(C)2009爱思唯尔有限公司保留所有权利。
The experimental and numerical work presented in this paper reveals that stress state has strong effects on both the plastic response and the ductile fracture behavior of an aluminum 5083 alloy. As a result, the hydrostatic stress and the third invariant of the stress deviator (which is related to the Lode angle) need to be incorporated in the material modeling. These findings challenge the classical J(2) plasticity theory and provide a blueprint for the establishment of the stress state dependent plasticity and ductile fracture models for aluminum structural reliability assessments. Further investigations are planned to advance, calibrate and validate the new plasticity and ductile fracture models. (C) 2009 Elsevier Ltd. All rights reserved.