Transactions of Materials and Heat Treatment

Title：Research on J-C constitutive and failure models for TA1 pure titanium sheet under high strain rate

Authors： Huang Yifan1 2 Dong Pengxin1 2 Wu Zelin1 2 Cao Quanliang1 2 Chen Qi1 2 Han Xiaotao1 2

Unit： 1.National Pulsed High Magnetic Field Science Center Huazhong University of Science and Technology 2.State Key Laboratory of High Power Electromagnetic Engineering and New Technology Huazhong University of Science and Technology

KeyWords： TA1 pure titanium dynamic mechanical properties constitutive model failure model stress triaxiality

ClassificationCode：TG146

year,vol(issue):pagenumber：2023,48(3):236-243

Abstract：

In order to explore the dynamic mechanical properties of TA1 pure titanium, the quasi-static and dynamic tensile experiments of TA1 pure titanium sheet samples with the thickness of 0.5 mm under different strain rates were carried out, the Johnson-Cook (J-C) constitutive model truly reflecting the plastic deformation characteristics of TA1 pure titanium in high strain rate and large strain range was established, and the original model was modified. Meanwhile, the quasi-static tensile experiments were carried out on TA1 pure titanium tensile samples with different notch radii, and the failure model based on stress triaxiality was established. The established J-C constitutive and failure models were applied to LS-Dyna for simulation, and the validity and practicability of the model were verified by comparing with the experimental data.

Funds：

国家自然科学基金资助项目（52077092）；湖北省重点研发项目（2021BAA174）

作者简介：黄艺帆 (1996-),男，硕士研究生 E-mail：cris@hust.edu.cn 通信作者：韩小涛 (1974-),男，博士，教授 E-mail：xthan@mail.hust.edu.cn

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