基于Ansys/LS-DYNA对SHPB实验技术进行了数值模拟，分析了不同厚度比的钢/聚氨酯夹层板在多种应变率下的动态压缩力学性能，在此基础上分别基于ZWT模型和Johnson-Cook模型建立了此类夹层板的动态压缩本构方程，并对2种方程进行对比分析。研究表明，钢/聚氨酯夹层板对应变率非常敏感，屈服强度随应变率的增大而显著提高；基于Johnson-Cook模型构建的钢/聚氨酯夹层板动态压缩本构方程能比较精确的描述不同厚度比的钢/聚氨酯夹层板在高应变率下的应力应变关系，方程具有一般性且精度较高。
Based on Ansys/LS-DYNA, the numerical simulation of SHPB experiment technology was carried out, analyzed the dynamic compressive mechanical properties of steel/polyurethane sandwich panels with different thickness ratios at various strain rates. Based on ZWT model and Johnson-Cook model, the dynamic constitutive equation of this sandwich plate is established, and the two equations are compared and analyzed. The results show that the steel/polyurethane sandwich plate is very sensitive to the strain rate and the yield strength is significantly improved with the increase of the strain rate. The dynamic compression constitutive equation of the steel/polyurethane sandwich plate based on Johnson-Cook model can describe the difference thickness ratio of steel/polyurethane sandwich plate at high strain rate under the stress and strain relationship, the equation has a general and high precision.
2018,40(9): 89-94 收稿日期：2017-07-01
DOI：10.3404/j.issn.1672-7649.2018.09.017
分类号：O347
基金项目：国家自然科学基金青年科学基金项目资助（51609110）
作者简介：汪雅棋(1958-),女,高级实验师,主要从事材料力学性能及力学实验教学研究
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