【摘要】 采用分离式Hopkinson压杆技术对JH-14C传爆药在不同应变率冲击过载作用下的动态响应特性进行研究,观察该传爆药的宏观破坏形式并对回收试样细观损伤模式进行扫描电镜(SEM)观测,获得相应的应力-应变曲线。结果表明,该传爆药的应力-应变曲线呈现明显的应变率效应,失效应力随应变率的增加而增加,失效应变基本保持不变。更多还原

【Abstract】 The dynamic response performance of booster explosive JH-14C under different strain-rate(from 1400s-1 to 4000s-1) impact over-loading is studied by using the split Hopkinson pressure bar technique.The macro failure-forms of booster explosive JH-14C and failure-modes of the recovery specimen are observed and analyzed by SEM and corresponding stress-strain curves are obtained.Results indicate that the stress-strain curves of booster explosive JH-14C exhibit distinct strain-rate effect,and failure-stress increase as the increase of strain-rate,but failure-strain keep invariant.更多还原