应力状态在球形弹丸撞击6061-T6铝薄靶弹道行为数值预报中的作用

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摘要近期研究表明，部分金属材料的延性断裂与应力三轴度和Lode参数同时相关。将近期文献中提出的两个包含Lode参数影响的断裂准则写入了有限元程序ABAQUS，并用于1.6 mm厚6061-T6铝合金靶板在7.9 mm直径球形弹丸撞击下断裂行为和弹道极限的数值预报。为揭示应力状态的影响，同时还采用了两种不考虑Lode参数影响的断裂准则进行了有限元计算，并将数值模拟结果与试验结果进行了对比。对比表明，Lode参数的引入可提升6061-T6铝合金靶板断裂行为和抗侵彻性能的数值预报效果。

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关键词 ：冲击动力学, 金属靶板, 数值模拟, 弹道极限, 应力状态

Abstract：Recent studies show that the ductile fracture of some metals may depend on not only the stress triaxiality but also the Lode parameter. Two ductile fracture criteria developed in recent publications incorporating the Lode parameter effect were implemented into ABAQUS and were employed in the numerical prediction of the fracture behavior and ballistic resistance of 1.6 mm thick 6061-T6 aluminum alloy targets under impacts of the 7.9 mm diameter steel ball. To reveal the effect of the stress state, FE calculations by using another two fracture criteria without incorporation of the Lode parameter were conducted. These predictions were compared with test results reported in the open literature. The present comparison study shows that the incorporation of the Lode parameter can improve the prediction on the fracture behavior and ballistic resistance of 6061-T6 aluminum alloy targets.

Key words： high velocity impact metallic target numerical simulation ballistic resistance stress state

收稿日期: 2015-04-01 出版日期: 2015-11-25

引用本文:

肖新科1，王要沛2，王爽1，张伟3. 应力状态在球形弹丸撞击6061-T6铝薄靶弹道行为数值预报中的作用[J]. 振动与冲击, 2015, 34(22): 87-91.
Xinke Xiao 1 Yaopei Wang2 Shuang Wang1 Wei Zhang3. Effect of the stress state on the numerical prediction of the ballistic resistance of thin 6061-T6 aluminum alloy targets against sphere projectile impacts. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(22): 87-91.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I22/87

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