杨阳;庞松;赵枢明;陈小虎;唐盛明;任政;刘燕林;徐永东;付应乾;董新龙;

• 1:中国兵器科学研究院宁波分院
• 2:上海航天精密机械研究所
• 3:宁波大学冲击与安全工程教育部重点研究实验室
• 4:宁波大学机械工程与力学学院

摘要(Abstract)：

绝热剪切是金属材料动态破坏的主要机制之一,用试验和有限元模拟对分离式霍普金森压杆(SHPB)动态压缩过程TA2钛的绝热剪切带形成、发展过程进行研究。通过对回收试样的显微组织金相分析,得到试样中绝热剪切带特征;利用有限元模拟对压缩试样的变形、绝热剪切带形成、发展开展探讨。结果表明:绝热剪切带在空间呈对立的双锥形,裂纹沿绝热剪切带发展,导致试样破坏;基于Johnson-Cook本构模型拟合得到的材料参数,用剪切损伤软化模型描述绝热剪切带形成及发展过程,有限元模拟结果与试验结果符合;有限元模拟结果显示一旦形成绝热剪切带,试样其它部分的变形不再发展,整体应变主要是剪切带贡献,剪切带内温度可达680℃。

关键词(KeyWords)： 绝热剪切;动态压缩;TA2钛合金;有限元模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（11672143）;; 军委科技委国防科技创新特区项目

作者(Author): 杨阳;庞松;赵枢明;陈小虎;唐盛明;任政;刘燕林;徐永东;付应乾;董新龙;

Email:

DOI: 10.14024/j.cnki.1004-244x.20200708.001

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