材料科学
可塑性
结构工程
休克(循环)
合金
压力(语言学)
断裂(地质)
依赖关系(UML)
复合材料
机械
计算机科学
工程类
医学
软件工程
物理
内科学
哲学
语言学
作者
Sina Gohari Rad,Majid Alitavoli,Asghar Zajkani,A. Darvizeh
出处
期刊:International Journal of Applied Mechanics
[World Scientific]
日期:2016-06-01
卷期号:08 (04): 1650050-1650050
被引量:7
标识
DOI:10.1142/s1758825116500502
摘要
In this paper, the evolution of a ductile damage in the 7075-T6 aluminum alloy is considered based on stress state parameters with a special focus on pre-mechanical working dependency. Uniaxial stress–strain curves are investigated experimentally for two conditions; specimens with shock loaded pre-mechanical working and without it. This kind of loading is applied in order to find out impulsive pressure effects of damage variation procedure. Some experiments are done to take different stress states. Applying two fracture initiations criteria, i.e., Hosford–Coulomb and Xue models, two types of fracture locus of Al-7075-T6 are predicted in terms of plastic strains and stress state parameters under above conditions. By considering experimental data, a new ductile damage evolution model is proposed among plastic behavior. It is introduced by explicating an uncoupled plasticity and related to initial rate dependent stress state. By using both fracture models, our damage evolution model is implemented, phenomenologically as well as the Xue damage model, to compare results.
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