摘要
为探究TA1纯钛的动态力学性能,对0.5 mm厚度的TA1纯钛薄板试样进行了准静态以及不同应变速率下的动态拉伸实验,建立了能够真实反映TA1纯钛在高应变速率和较大应变范围内的塑性变形特征的Johnson-Cook(J-C)本构模型,并对原始模型进行了修正;同时,对不同缺口半径的TA1纯钛拉伸试样进行了准静态拉伸实验,建立了基于应力三轴度的失效模型。将建立的J-C本构与失效模型应用于LS-Dyna中进行仿真模拟,并与实验数据对比,验证了模型的有效性与实用性。
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 O.5 mm under different strain rates were carried out,the Johnson-Cook(J-C)constitutive model truly reflecting the plastic deformation characteristics of TAl 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.
作者
黄艺帆
董芃欣
吴泽霖
曹全梁
谌祺
韩小涛
Huang Yifan;Dong Pengxin;Wu Zelin;Cao Quanliang;Chen Qi;Han Xiaotao(National Pulsed High Magnetic Field Science Center,Huazhong University of Science and Technology,Wuhan 430074,China;State Key Laboratory of High Power Electromagnetic Engineering and New Technology,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2023年第3期236-243,共8页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(52077092)
湖北省重点研发项目(2021BAA174)。
关键词
TA1纯钛
动态力学性能
本构模型
失效模型
应力三轴度
TA1 pure titanium
dynamic mechanical properties
constitutive model
failure model
stress triaxiality
