摘要
从实验、理论与数值模拟的结合上,对于高加载率的SHPB试验原理提出一种新理念。一方面采用一维有限差分方法对SHPB试验原理进行全过程数值模拟,考察SHPB试验经典分析方程对于高加载率情况的适用性;另一方面把SHPB试验经典分析确定的试件材料本构关系嵌入SHPB试验全过程数值模拟,考察数值模拟再现高加载率SHPB试验测得的反射波形及透射波形的可能性。通过对高加载率SHPB试验的数值实例,指明了如同Wu等揭示的实验规律:试件两端的应力平衡依赖于试件厚度及加载率。
An analysis of the split Hopkinson pressure bar (SHPB) test at high loading rate is presented concerning the experimental data, the numerical simulation and the description of constitutive laws of specimen. First, the validity of the classical SHPB analyses at high loading rate is re-examined using one-dimensional simulation of SHPB test. On the other hand, the numerical simulation of the SHPB test at high loading rate using the constitutive law of the specimen obtained by classical SHPB analyses is performed to reproduce the experimental reflected pulse and transmitted pulse. Some experimental facts of SHPB tests at high loading rate revealed by Wu et al are also indicated in simulated examples, i.e., that the stress equilibrium between the ends of compression SHPB specimens is dependent on specimen length and loading rate.
出处
《工程力学》
EI
CSCD
北大核心
2005年第1期82-87,共6页
Engineering Mechanics
基金
国家自然科学基金资助项目(10272058)
中国工程物理研究院专项基金资助项目
