正火态50SiMnVB钢Johnson-Cook本构方程的建立  

Establishing of Johnson-Cook constitutive equation for normalized steel 50SiMnVB

作　　者：刘盼萍[1] 尹燕 常列珍[1] 薛勇[3,4] 

机构地区：[1]中北大学理学院,山西太原030051 [2]宁波鄞州区职业教育中心,浙江宁波315100 [3]中北大学材料科学与工程学院,山西太原030051 [4]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《兵器材料科学与工程》2009年第1期45-49,共5页Ordnance Material Science and Engineering

基　　金：国家自然科学基金(50575213);山西省青年科学基金项目(2007021026)

摘　　要：对正火态的50SiMnVB钢常温下的准静态和动态力学特性进行测试,得出材料在不同应变率下的应力-应变曲线。根据Johnson-Cook模型,建立正火态50SiMnVB钢从准静态到动态较宽应变速率范围的物理本构方程。对比结果表明,所建立的本构方程和实验结果吻合较好。The quasi-static and dynamic properties of normalized 50SiMnVB steel at room temperature were tested, and true stress-true strain curves at several strain rates were obtained. According to the Johnson-Cook model, the physical constitutive models for normalized 50SiMnVB steel were established, which described the deformation characteristics of the steel in a wide range of strain rates from quasi-static to dynamic range. Comparative results showed that the established constitutive equation agreed well with experimental results.

关 键 词：正火 50SiMnVB钢 Johnson-Cook本构方程 

分 类 号：O347.3[理学—固体力学]