STUDY ON CONSTITUTIVE MODEL AND MECHANICAL PROPERTIES OF 7003 ALUMINUM ALLOY

XU Yun; HU YuMei; ZHAO WeiMin; LI Jie

doi:10.16579/j.issn.1001.9669.2019.06.009

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STUDY ON CONSTITUTIVE MODEL AND MECHANICAL PROPERTIES OF 7003 ALUMINUM ALLOY

更新时间：2022-09-22

- STUDY ON CONSTITUTIVE MODEL AND MECHANICAL PROPERTIES OF 7003 ALUMINUM ALLOY
- Journal of Mechanical Strength Vol. 41, Issue 6, Pages: 1321-1326(2019)
- 作者机构：
  
  1. 重庆大学机械传动国家重点实验室
  2. 汽车噪声振动和安全技术国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.06.009
  CLC：
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XU Yun, HU YuMei, ZHAO WeiMin, et al. STUDY ON CONSTITUTIVE MODEL AND MECHANICAL PROPERTIES OF 7003 ALUMINUM ALLOY. [J]. 41(6):1321-1326(2019)
DOI：

XU Yun, HU YuMei, ZHAO WeiMin, et al. STUDY ON CONSTITUTIVE MODEL AND MECHANICAL PROPERTIES OF 7003 ALUMINUM ALLOY. [J]. 41(6):1321-1326(2019) DOI： 10.16579/j.issn.1001.9669.2019.06.009.

摘要

通过动、静力学试验获得了7003铝合金材料在不同应力三轴度和不同应变率条件下的应力-应变曲线和材料断裂特性参数,利用试验结果拟合了对应变率敏感的Johnson-Cook材料本构模型参数。试验结果表明7003铝合金是一种典型的塑性金属材料,断裂破坏过程具有一定的应变率敏感性,且断裂应变随着应力三轴度增高而降低;通过LSDYNA仿真软件模拟了7003铝合金零件的断裂全过程,仿真结果与试验吻合良好,研究结果可以为7003铝合金薄壁类零件的设计和分析提供参考。

Abstract

The stress-strain curves and fracture characteristics of 7003 aluminum alloy under different stress triaxiality and strain rates were obtained by dynamic and static tests,and the constitutive model of Johnson-Cook material with sensitive strain rate was fitted by the experimental results. The experimental results show that the fracture process of 7003 aluminum alloy has strain rate sensitivity,and the fracture strain decreases with the increase of stress triaxiality. The whole fracture process of 7003 aluminum alloy was simulated by LS-DYNA software,and the simulation results were in good agreement with the experiment.

关键词

7003铝合金Johnson-cook本构模型应力三轴度应变率

Keywords

7003 aluminum alloyJohnson-cook constitutive modelStress triaxialityStrain rate

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