船用907A钢的动态力学性能和本构关系  

Dynamic mechanical behavior and constitutive relation of the ship-built steel 907A

作　　者：李营[1,2] 汪玉[2] 吴卫国[1] 杜志鹏[2] 李晓彬[1] 张玮[2] 

机构地区：[1]武汉理工大学交通学院,湖北武汉430063 [2]海军装备研究院,北京100161

出　　处：《哈尔滨工程大学学报》2015年第1期127-129,共3页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(11302259);中央高校基本科研业务费专项基金资助项目(2011YB08)

摘　　要：为了得到船用907A钢的动态力学性能及本构关系,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 33~2 680 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,对比了Cowper-Symonds模型和Johnson-Cook模型,并基于CS模型对应变硬化效应进行了修正。结果表明,船用907A钢具有明显的应变率强化效应和非线性应变硬化效应;CS模型比JC模型更能准确描述其应变率强化效应。In order to get the dynamic mechanical properties and constitutive relation of the ship-built steel 907 A,the stress-strain curve within the scope of 0.000 33 - 2 680 s-1under quasi static stretching and dynamic compression condition was derived using the static testing machine and split Hopkinson press bar（ SHPB）. The Johnson-Cook（ JC） model and Cowper-Symonds（ CS） model were compared and the hardening effect of strain was corrected based on the CS model. The results showed that ship-built steel 907 A has a remarkable effect in strengthening strain rate and hardening nonlinear strain,and the CS model can describe the effect of strengthening strain more exactly than JC model.

关 键 词：船用907A钢 动态力学性能 本构关系 Cowper-Symonds模型 

分 类 号：U668.1[交通运输工程—船舶及航道工程]