摘要
采用夹持器椭圆度分别为0、1/3、1/2和2/3的鼓胀试验方法研究金属薄板力学性能。结合单向拉伸实验能准确测量出金属薄板处于弹性阶段时应力应变关系这一特性,通过有限元模拟鼓胀试验,反求出金属薄板材料处于双向拉伸状态下真实应力应变关系。综合分析试验数据与模拟试验反求数据,对不同主应力比状态下金属薄板进行力学性能研究,得出定椭圆度的金属薄板所受的主应力比不是一固定值;鼓胀试验试件最大应变与椭圆度之间存在反比例关系,而主应力比与椭圆度呈正比例关系。
The experimental studies on the mechanieal properties of sheet metal involved the bulge test, the gripper＇s ovality used in bulge test is 0, 1/3, 1/2 and 2/3 respectively. With the uni-axial tensile experiment, the characters of strain-stress relationship in the range of elasticity were measured accurately. By using Finite Element Analysis （FEA） to simulate the bulge test, we deduced the true stress-strain relationship of the sheet metal under the bi-axial tensile test. By comparing experimental and simulation data, we studied on mechanical properties of sheet metal in different principal stress ratio, and demonstrated that the principal stress ratio of sheet metal with a gripper of a specified ovality was not a fixed value. Moreover, there was an inverse correlation between the maximal strain and the ovality, while the principal stress ratio was directly correlated to the ovality.
出处
《机械设计与制造》
北大核心
2017年第2期157-160,共4页
Machinery Design & Manufacture
基金
"十二五"国家科技支撑计划课题(2011BAK06B02-06)
关键词
金属薄板
鼓胀试验
主应力比
力学性能
有限元分析
单向拉伸试验
Sheet Metal
Bulge Test
Principal Stress Ratio
Mechanical Properties
Finite Element Analysis
Uniaxial Tensile Test
作者简介
作者简介：王存益，（1990-），男，江苏南通人，硕士研究生，主要研究方向：过程装备结构完整性
高光藩，（1964-），男，山西临县人，博士研究生，教授。主要研究方向：过程装备结构完整性
