FEM Analysis of Spring-backs in Age Forming of Aluminum Alloy Plates

作     者：Huang Lin Wan Min Chi Cailou Ji Xiusheng 

作者机构：Department of Aircraft Manufacturing Engineering Beijing University of Aeronautics and Astronautics Beijing 100083 China Technology Research Institute Shenyang Aircraft Corporation Shenyang 100034 China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2007年第20卷第6期

页      面：564-569页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：National Natural Science Foundation of China (50675010) 

主　　题：aluminum alloy age forming constitutive equation FEM spring-back 

摘      要：The age forming technology, characterized by huge spring-backs, has been developed to manufacture large integral wing-skin panel parts, which necessitates devising a method of predicting spring-backs. A 7B04-T7451 aluminum alloy creep test in tension is accomplished at 155 ℃, and the creep curves are obtained. The material constants of the mechanism-based creep constitutive equations are determined through experiments. The age forming process and the spring-backs of 7B04 aluminum alloy plates are analyzed using the commercial finite element software ABAQUS. The effects of plate thickness and forming time on spring-backs are researched. The spring-backs decrease with the increase of plate thickness and forming time. The test results verify the reliability of the finite element method （FEM） analysis.