摘要
为了得到船用E36钢的动态力学性能及本构关系,本文运用静态试验机及分离式Hopkinson压杆加载装置,在应变率为0.000 33~2330 s-1范围内得到了准静态拉伸及动态压缩条件下的应力应变曲线,同时对Cowper-Symonds材料模型进行了修正,得到了两种形式的本构关系,并讨论了模型的适用性。结果表明:船用E36钢具有明显的应变率强化效应和非线性应变硬化效应;两种动态本构关系可以描述材料在冲击荷载下的力学性能,但应用范围不同。
The σ-ε relation of shipbuilding E36 steel under different strain rates(0.0002-3900 s-1)was studied by the MTS(materials test system) and the split Hopkinson press bar(SHPB), two improved Cowper-Symonds models and the parameters were obtained, and then the applicability of the models was investigated. The experimental results show that shipbuilding E36 steel has remarkable strain rate effect and nonlinear strain hardening effect. The dynamic constitutive model of shipbuilding E36 steel can describe the dynamic mechanical behaviors under high strain rate.
作者
张玮
毛柳伟
杨坤
李营
ZHANG Wei;MAO Liu-wei;YANG Kun;LI Ying(Naval Research Academy,Beijing 100161,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Institute of Advanced Structure Technology,Beijing Institute of Technology,Beijing 100081,China)
出处
《船舶力学》
EI
CSCD
北大核心
2022年第6期912-918,共7页
Journal of Ship Mechanics
基金
自然科学基金资助项目(52171290)。
