微细塑性成形计算机模拟技术研究  

Study on numerical simulation of the micro-plastic-forming

作　　者：马宁[1] 董湘怀[2] 

机构地区：[1]华中科技大学塑性成形模拟及模具技术国家重点实验室,湖北武汉430074 [2]上海交通大学塑性成形工程系,上海200030

出　　处：《华中科技大学学报（自然科学版）》2005年第4期73-75,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50275059).

摘　　要：在分析应变梯度塑性理论的发展及其应用的基础上,参考目前一个新的考虑了材料尺度效应的硬化关系,采用理论分析、计算机模拟和实验分析相结合的方法,对微细零件的冲压成形工艺进行了系统研究.利用ABAQUS/Standard的用户材料子程序UMAT编写程序,并成功被ABAQUS调用;运用编写的程序模拟了薄悬臂梁的微弯曲情况,并与实验结果比较分析,结果证实了所采用的本构关系和开发的用户子程序的有效性和实用性.Briefly stated the development of the strain gradient plasticity and its application. A new hardening law of the strain gradient theory was referred to in this paper. This paper analyzed the process of micro-part, combing the function of theoretical analysis after reviewing the theory of strain gradient plasticity and referring to a new hardening law in this theory. The capability of the developed material modle was demonstrated through its implementation in the ABAQUS finite element code to simulate the response of ~evans microbend test configuration. The simulated response agrees favorably with the physical test results, which confirms the validity and practicability of the user sobroutine.

关 键 词：微细塑性加工 应变梯度理论 本构模型 用户子程序 

分 类 号：TG301[金属学及工艺—金属压力加工]