冲压成型板材特性参数的反求方法  

An Inverse Technique for Determining the Material Property Parameters of Sheet Metal After Stamping

作　　者：姜潮[1] 李超[1] 陶友瑞[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082

出　　处：《汽车工程》2012年第4期373-378,共6页Automotive Engineering

基　　金：国家自然科学基金项目(10802028);国家重点基础研究发展计划(973)(2010CB832700);高档数控机床与基础制造装备科技重大专项(2010ZX04017-013-005)资助

摘　　要：鉴于通常的拉伸试验不适用于测定冲压成型后板材因产生塑性变形而改变了的特性参数,提出一种此类问题的反求方法。它采用材料的加工硬化模型进行正问题计算,通过试验数据与仿真数据构成的最小二乘误差方程式建立反问题模型。最后通过一种实际冲压件的试验验证了该方法的有效性。In view of that conventional tensile test is not suitable for determining the changed material property parameters of sheet metal after stamping due to plastic deformation,an inverse technique is proposed for this issue instead.The technique conducts the calculation of forward problem by adopting the work hardening model of material and set up another model for inverse problem through least square error equation constructed based on test and simulation data.Finally,the effectiveness of the technique is verified by the test on a real stamped part.

关 键 词：材料特性参数 反求方法 冲压 板材 

分 类 号：TG386[金属学及工艺—金属压力加工]