TC4热氧化钛合金内空半球壳体的动态响应

doi:10.3969/j.issn.1000-1565.2020.01.001

河北大学学报(自然科学版) ›› 2020, Vol. 40 ›› Issue (1): 1-6.DOI: 10.3969/j.issn.1000-1565.2020.01.001

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TC4热氧化钛合金内空半球壳体的动态响应

牛晓燕,耿旭琛,陈聪,申林林,张占彪

收稿日期:2019-06-20 出版日期:2020-01-25 发布日期:2020-01-25
作者简介:牛晓燕(1979—),女,河北沙河人,河北大学教授,博士,主要从事弹塑性力学研究. E-mail:niu-xiaoyan2002@163.com
基金资助:
国家自然科学基金资助项目(11502065);河北省教育厅重点项目(ZD2016146);河北省自然科学基金资助项目(A2019201338)

Dynamic response of hollow hemispherical shell of titanium alloy after thermal oxidation

NIU Xiaoyan, GENG Xuchen, CHEN Cong, SHEN Linlin, ZHANG Zhanbiao

College of Civil Engineering, Hebei University, Baoding 071002, China

Received:2019-06-20 Online:2020-01-25 Published:2020-01-25

摘要/Abstract

摘要： 利用有限元程序对TC4(Ti-6Al-4V)热氧化钛合金内空半球壳体进行子弹冲击模拟,基于准静态压缩实验和动态Hopkinson压杆实验数据,研究了径厚比、冲击速度、应变率效应对TC4热氧化钛合金内空半球壳体动态响应的影响,得到了不同工况下的TC4热氧化钛合金内空半球壳体的接触力峰值以及顶点位移.TC4热氧化钛合金的材料模型由实验数据拟合得到的考虑应变率效应和温度效应的Johnson-Cook本构方程描述,其中,实验数据由Hopkinson压杆技术测得.结果表明:接触力峰值和顶点位移均与径厚比成反比;接触力峰值和顶点位移均与冲击速度成正比;考虑应变率效应更能反映TC4热氧化钛合金内空半球壳体的抗冲击能力和抗变形能力.

关键词: TC4热氧化钛合金, Johnson-Cook本构方程, 峰值接触力, 动态响应, 应变率效应

Abstract: The finite element program is used to simulate the bullet impact of TC4(Ti-6Al-4V)hot titanium oxide alloy inner hollow hemisphere shell. Based on quasi-static compression test and dynamic Hopkinson pressure bar test data, the effect of diameter-thickness ratio, impact velocity and strain rate on TC4 is studied. The contact force peak and the vertex displacement of the inner hollow hemisphere shell of TC4 hot titanium oxide alloy under different working conditions were obtained. The material model of the TC4 hot titanium oxide alloy is described by the Johnson-Cook constitutive relationship considering the strain rate effect and the temperature effect, where in the test data is measured by Hopkinson pressure bar technology. The results show that the contact force peak and the vertex displacement are inversely proportional to the diameter-thickness ratio; the contact force peak and the vertex displacement are both proportional to the impact velocity; the strain rate effect enhances the impact resistance and the resistance of deformation of the TC4 hot titanium oxide alloy inner hollow hemisphere shell.

Key words: TC4 hot titanium oxide alloy, Johnson-Cook equation, peak contact force, dynamic response, strain rate effect

中图分类号:

O347.3

牛晓燕,耿旭琛,陈聪,申林林,张占彪. TC4热氧化钛合金内空半球壳体的动态响应[J]. 河北大学学报(自然科学版), 2020, 40(1): 1-6.

NIU Xiaoyan, GENG Xuchen, CHEN Cong, SHEN Linlin, ZHANG Zhanbiao. Dynamic response of hollow hemispherical shell of titanium alloy after thermal oxidation[J]. Journal of Hebei University (Natural Science Edition), 2020, 40(1): 1-6.

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TC4热氧化钛合金内空半球壳体的动态响应

Dynamic response of hollow hemispherical shell of titanium alloy after thermal oxidation

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