基于有限元分析的精冲凸模寿命估算  

The estimation of fine-blanking punch life based on FEM analysis

作　　者：程然[1] 胡建华[1] 黄尚宇[1] 朱彦生[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《塑性工程学报》2010年第3期119-123,共5页Journal of Plasticity Engineering

摘　　要：文章采用有限元软件DEFORM-3D对常温下的AISI-1010钢材毛坯进行精冲成形模拟,同时对精冲凸模的应力场进行有限元分析。通过剖析精冲过程中凸模的应力应变分布规律,采用局部应力-应变方法,建立了模具与应力应变紧密相关的疲劳寿命估算模型。对疲劳强度指数b进行了修正,使估算模型更加接近实际地预测模具的疲劳寿命。The forming process of AISI-1010 sheet at room temperature and the stress fields of fine-blanking punch were simulated with commercial finite element analysis package,DEFROM-3D.A fatigue failure model for the punch life estimation was set up by local stress-strain approach.Considering the effect of dimension and stress gradient,the fatigue index was amended to enhance the accuracy of the punch life estimation.

关 键 词：精冲 有限元模拟 疲劳失效 寿命估算 

分 类 号：TG386[金属学及工艺—金属压力加工]