SPRINGBACK SIMULATION AND ANALYSIS OF STRONG ANISOTROPIC SHEET METALS IN U-CHANNEL BENDING PROCESS  

作　　者：柳玉起 胡平 王锦程 

机构地区：[1]Department of Applied Mechanics, Jilin University, Changchun, China 130025

出　　处：《Acta Mechanica Sinica》2002年第3期264-273,共10页力学学报（英文版）

基　　金：The project supported by the National Natural Science Foundation of China (No. 19832020);Provincial Natural Science Foundation of Jilin China (No.20000519)

摘　　要：The springback phenomenon of strong anisotropic sheet metals with U-channel bending as well as deep-drawing is numerically studied in detail by using Updating Lagrange FEM based on virtual work-rate principle, Kirchhoff shell element models and the Barlat-Lian planar anisotropic yield function. Simulation results are compared with a benchamark test. Very good agreement is obtained between numerical and test results. The focus of the present study is on the numerical simulation of the springback characteristics of the strong anisotropic sheet metals after unloading. The effects of the planar anisotropy coefficients and yield function exponent in the B-L yield function on the springback characteristics are discussed in detail. Some conclusions are given.The springback phenomenon of strong anisotropic sheet metals with U-channel bending as well as deep-drawing is numerically studied in detail by using Updating Lagrange FEM based on virtual work-rate principle, Kirchhoff shell element models and the Barlat-Lian planar anisotropic yield function. Simulation results are compared with a benchamark test. Very good agreement is obtained between numerical and test results. The focus of the present study is on the numerical simulation of the springback characteristics of the strong anisotropic sheet metals after unloading. The effects of the planar anisotropy coefficients and yield function exponent in the B-L yield function on the springback characteristics are discussed in detail. Some conclusions are given.

关 键 词：SPRINGBACK planar anisotropy Updating Lagrange FEM Kirchhoff shell element 

分 类 号：O343.8[理学—固体力学]