• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (22): 57-66.doi: 10.3901/JME.2017.22.057

• 材料科学与工程 • 上一篇    下一篇

不同硬化模型对铝合金板冲压成形模拟结果的影响

金飞翔1, 钟志平1, 李凤娇2, 孟辉3   

  1. 1. 机械科学研究总院 北京 100044;
    2. 北京机电研究所 北京 100083;
    3. 长城汽车股份有限公司哈佛技术中心 保定 071000
  • 收稿日期:2016-11-01 修回日期:2017-04-17 出版日期:2017-11-20 发布日期:2017-11-20
  • 通讯作者: 钟志平(通信作者),男,1969年出生,博士,研究员,博士研究生导师。主要研究方向为板材成形、精密塑性成形、微观组织性能预测与控制等。E-mail:zhongzhp@jds.ac.cn
  • 作者简介:金飞翔,男,1988年出生,博士研究生。主要研究方向为汽车轻量化材料及先进成形技术。E-mail:brimetamtejfx@163.com
  • 基金资助:
    国家科技重大专项(2014ZX04002-071)和国家国际科技合作专项(2015DFA51740)资助项目。

Influence of Different Hardening Model for the Simulating Results of the Aluminum Alloy Sheet Stamping

JIN Feixiang1, ZHONG Zhiping1, LI Fengjiao2, MENG Hui3   

  1. 1. China Academy of Machinery Science and Technology, Beijing 100044;
    2. Beijing Research Institute of Mechanical and Electrical Technology, Beijing 100083;
    3. Technology center of Harvard, Great Wall Motor Company Limited, Baoding 071000
  • Received:2016-11-01 Revised:2017-04-17 Online:2017-11-20 Published:2017-11-20

摘要: 研究不同塑性变形硬化模型对汽车5182-O铝合金板材冲压成形模拟结果的影响。采用材料单向拉伸试验得到应力应变关系曲线,基于Hollomom、Krupskowsky与Power方程对曲线进行拟合,建立材料室温下塑性变形硬化模型,对厚度为1.5 mm和0.85 mm的5182板材进行冲压试验和有限元模拟分析,对比分析冲压试验与模拟结果。试验与模拟结果显示,当板料厚度为1.5 mm时,板料冲压试验的成形力最大为42.95 kN,板料拉深深度为30.58 mm,基于Power方程计算得到的最大成形力为41.5kN与试验结果比较接近,Hollomom方程计算得到的拉深深度为30.546 mm,板材成形厚度分布与试验结果比较接近;当板料厚度为0.85 mm时,板料冲压试验的成形力最大为34.47kN,板料拉深深度为33.792 mm,基于Power方程计算得到的最大成形力为34.27 kN与试验结果比较接近,Hollomom方程计算得到的拉深深度为33.636 mm,板材成形厚度分布与试验结果比较接近。基于三种硬化模型铝合金冲压成形过程的计算模拟分析结果,并通过与试验对比得到不同硬化模型对铝合金板材冲压成形计算模拟的影响,进一步为汽车铝合金覆盖件在成形工艺的研究分析提供理论指导。

关键词: 冲压成形, 铝合金, 硬化模型, 有限元模拟

Abstract: Influence of the different plastic deformation hardening model of 5182-O aluminum alloy sheet stamping effected on simulation results is investigated. The curve of stress-strain relationship is got by the uniaxial tensile test. Based on Hollomom, Krupskowsky and Power equation the plastic deformation hardening model materials is obtained with curve fitting at room temperature. The stamping experiments and finite element simulation analysis of thickness for 1.5 mm and 0.85 mm of 5182 sheet are processed. The contrastive analysis of stamping experiment and simulation results are made. The experimental and numerical results show that forming force for 42.95 kN and maximum drawing depth for 30.58 mm with the sheet thickness for 1.5 mm, the maximum forming force for 41.5 kN based on Power equation are closed to the experiment result, the drawing depth for 30.546 mm and thickness distribution based on Hollomom equation is closed to the experiment result. The experimental and numerical results show that forming force for 34.47 kN and maximum drawing depth for 33.792 mm with the sheet thickness for 0.85 mm, the maximum forming force for 34.27 kN based on Power equation are closed to the experiment result, the drawing depth for 33.636 mm and thickness distribution based on Hollomom equation is closed to the experiment result. Simulation results of aluminum alloy stamping is processed with three kinds of hardening model. Influence of the different hardening model effected on simulation results is obtained by comparing with the sheet stamping experiment of aluminum alloy. Furthermore, the theoretical guidance is provided for research and analysis of the forming process for the automotive aluminum alloy parts.

Key words: aluminum alloy, finite element simulation, hardening model, stamping

中图分类号: