Transactions of Materials and Heat Treatment

Title：Finite element simulation of stretch bending on aluminum alloy extrusions

Authors： Wu Jingming1 Xiong Wenhua1 Luo Zhihui1 Wang Yongjun2 Liu Tianjiao2 Wang Junbiao2

Unit： 1. AVIC Jiangxi Hongdu Aviation Industry Group Co. Ltd. 2.Northwestern Polytechnical University

KeyWords： finite element simulation stretch bending extrusion ABAQUS/Explicit

ClassificationCode：

year,vol(issue):pagenumber：2015,40(4):54-59

Abstract：

The issue of simulation on stretch bending process of aluminum alloy extrusions is one of the problems in highly nonlinear quasi-static fields. When the explicit dynamics procedure is applied to quasi-static problems, the sensitivity of time on simulation analysis step is required to consider specially. Based on it, FE shell model of quasi-static analysis on stretch bending was established by ABAQUS/Explicit module for general stretch bending process. Then the springback，side-wall thickness and cross-section distortion were analyzed and predicted by static analysis with ABAQUS/Standard. An experiment of stretch bending on Al-2024-O extrusions with Z-section was carried out by A-7B CNC stretch bending forming machine,and the effectiveness of simulation was verified. The springback value, thickness and distortion of cross-section of parts were measured,and compared with the simulation results. The experiment results show the influences of post-stretching strain on the springback value, minimum thickness and cross-section distortion are coincide with the simulation results. And the average relative errors of springback and thickness are 13.74% and 1.66% respectively. It is demonstrated that the established model can be effectively applied to simulation of stretch bending of aluminum alloy.

Funds：

国家自然科学基金资助项目(51275420)；航空科学基金资助项目(2008ZE53037)

吴静明（1976-），男，本科，工程师

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