一种金属箔材双向拉伸试验方法  

A method of biaxial tensile testing for metallic sheets

作　　者：丁信伟[1] 高光藩[1] 由宏新[1] 

机构地区：[1]大连理工大学化工学院,大连116012

出　　处：《塑性工程学报》2002年第3期51-54,共4页Journal of Plasticity Engineering

摘　　要：用常规的单轴拉伸试验难以获得箔材机械性能的准确数据 ,目前采用的一些双向拉伸试验方法还存在着各自的不足。本文提出并详细介绍了一种金属箔材双向拉伸试验方法。在平膜鼓胀装置上 ,通过测量膜片极顶的面内真应变和横向塑性应变以及膜片的轮廓形状 ,并计入泊松比随变形过程发生的变化 ,可建立二向应力状态下箔材从弹性经塑性至破裂的整个变形范围内真应力和真应变的关系 。It's difficult to acquire accuracy mechanical properties of metallic sheets by uniaxial tensile testing.There are also some shortages in the current biaxial tensile testing methods. A new method for the biaxial tensile testing of metallic sheets is put forward. On the experimental device of metallic membrane bulging, the measuring of in-plane true strain, transverse plastic strain at the pole of sheet, and the contour shape of sheet can be done. So that the relationship between true stress and true strain in the all deformation range of metallic sheets can thus be built up. Furthermore, the changing pattern of elasto-plastic and plastic Poisson's ratio can also be obtained.

关 键 词：金属箔材 双向拉伸 箔材 试验方法 真应力 真应变 

分 类 号：TG115.52[金属学及工艺—物理冶金]