二维塑性变形中应变分布测量的新方法  

A New Method of Measuring the Strain Eistributions in 2D Plastic Deformation

作　　者：苑世剑[1] 李峰[1] 何祝斌[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《应用基础与工程科学学报》2008年第1期103-109,共7页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(50525516)

摘　　要：为了解决复杂构件体积成形过程中金属变形流线和塑性应变分布难于定量测量的问题,本文提出了一种用套环螺纹的测量方法.该方法不用替代材料即可实现对体积成形过程的三维塑性变形的测定,进行定量分析.利用该方法对轮毂件成形过程中四条流线及其轴向应变进行了测量分析,并将实验结果与数值模拟进行了对比.用套环螺纹法获得的应变分布与有限元模拟的应变分布吻合,说明该方法是测量体积成形过程中塑性应变分布较为有效的实验方法.A new method of testing the strain distribution was put forward in order to solve the difficulties in analyse the behaviour of metal flow quantitatively, which was named lantern ring screw thread. This method can not only examine but also analyse the deformation process quantitatively without substituted material. The experimental result was consistent well with the simulation result when using the method to analyse the four main streamlines and the axial strain during the deformation of one complex steel hub. So it can be used as a reliable experimental method to examine the behaviour of metal flow during complex components deformation.

关 键 词：复杂构件 塑性变形 应变分布 实验方法 

分 类 号：TG306[金属学及工艺—金属压力加工]