不同应力状态下St14-T冷轧薄板本构关系研究  

Constitutive relationship of cold-rolled St14-T metal sheet under different stress state

作　　者：蒋浩民[1] 陈新平[1] 吴华[1] 汪承璞[1] 

机构地区：[1]宝山钢铁股份有限公司技术中心,上海201900

出　　处：《塑性工程学报》2002年第2期46-48,共3页Journal of Plasticity Engineering

摘　　要：采用液压胀形试验分析了双向拉伸变形过程板材的应力梯度和应变分布 ,确定了双向拉伸变形状态下板材的应力应变关系曲线 ,探讨了不同应力状态下板材的本构关系。研究结果表明 ,不同应力状态下板材的本构方程存在一定的差异 ,双向拉伸变形条件更有利于发挥材料塑性变形的潜力。与单向拉伸相比 ,双向拉伸变形更有助于板料变形的均匀化 。The stress gradient and strain distribution of sheet metal during double\|tension process are analyzed by hydro\|bulging test Meanwhile the strain\|stress curve is determined.The constitutive relationships under different stress state are discussed.It is shown that there lies certain difference between the constitutive relationships under different stress states.The plastic potential of metal sheet is easi to be obtained under double\|tension state.Compared to the single\|tension,double\|tension is beneficial to the uniform of sheet deformation and suppress the generation and further development of local neck.

关 键 词：St14-T冷轧薄板 板材 液压胀形 本板关系 应变分布 应力梯度 冷轧 

分 类 号：TG335.55[金属学及工艺—金属压力加工] TG331