高应变速率下TA1纯钛薄板的J-C本构及失效模型研究  

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

作　　者：黄艺帆 董芃欣 吴泽霖 曹全梁[1,2] 谌祺 韩小涛[1,2] 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)

机构地区：[1]华中科技大学国家脉冲强磁场科学中心,湖北武汉430074 [2]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074

出　　处：《锻压技术》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)。

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.

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 

分 类 号：TG146[一般工业技术—材料科学与工程]