火炸药学报2012，Vol.35Issue(5)：52-57,6.
基于微裂纹统计模型的PBX力学行为
Mechanical Behavior of PBX Based on SCRAM Model
摘要
Abstract
The differential equations of Visco-SCRAM model were simplified into incremental form in the condition of uniaxial stress. It was employed to simulate the mechanical behavior of PBX under uniaxial tension and compression at different strain rates. The corresponding physical processes were analyzed in terms of the average meso-crack radius. The effect of viscosity on the mechanical behavior of PBX was discussed. The results show that Visco-SCRAM model is able to predict the different behaviors respectively under tension and compression and the dependence of strain rate of both strength and modulus of PBX. At the peak stress, the average meso-crack radius rises as strain rate increasing, and it is significantly less under tension than compression loading at the same strain rate. It was shown that compression modulus and strength increase and the failure strain decrease resulted from the reduction of viscosity within a certain range.关键词
材料科学/高聚物黏结炸药/PBX/含能材料/SCRAM/微裂纹/本构关系Key words
material science/ polymer bonded explosive/ PBX/ energetic material/ SCRAM/ meso-crack/ constitutive relation分类
军事科技引用本文复制引用
郭虎,罗景润..基于微裂纹统计模型的PBX力学行为[J].火炸药学报,2012,35(5):52-57,6.基金项目
中国工程物理研究院重点基金资助项目(2009A0201008) （2009A0201008）
