• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2010, Vol. 46 ›› Issue (24): 10-15.

• 论文 • 上一篇    下一篇

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汽车用合金化镀锌深冲钢板动态变形行为试验研究及仿真分析

陈贵江;康永林;朱国明;吕超   

  1. 北京科技大学材料科学与工程学院;北京科技大学新金属材料国家重点实验室
  • 发布日期:2010-12-20

Dynamic Deformation Behavior Experiments of Alloy Galvanized Deep Drawing Steel Sheet for Automobile and Simulation

CHEN Guijiang;KANG Yonglin;ZHU Guoming;LÜ Chao   

  1. School of Materials Science and Engineering, University of Science & Technology Bejjing Sate Key Laboratory for Advanced Metals and Materials, University of Science & Technology Bejjing
  • Published:2010-12-20

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摘要： 针对汽车用合金化镀锌深冲钢板(DC53D+ZF)，采用准静态及动态拉伸试验，对不同应变率下钢板的动态变形行为进行研究，得到0～500 s–1应变率范围内的6种应变率下的应力应变关系，在试验结果的基础上，推导出该钢板的Johnson-Cook本构模型。为进一步验证该本构模型，基于矩形梁碰撞的仿真模型，对不考虑应变率、Johnson-Cook、Cowper-Symonds模型及试验数据进行对比分析，所推导的J-C模型与试验结果吻合较好。表明所得到的模型可以很好地描述DC53D+ZF材料高应变率下的动态变形行为。

关键词: Johnson-Cook本构, 动态拉伸, 仿真, 碰撞, 应变率

Abstract: Quasi-static and dynamic tensile tests are carried out on alloyed galvanized deep drawing steel sheet for automobile (DC53D+ZF) to investigate its tensile mechanical behavior under different strain rates. Stress-strain relationships are obtained in strain rate range of 0～500 s–1. Johnson-Cook constitutive model of the steel is derived from the experiment results. Model without considering strain rate, Johnson-Cook, Cowper-Symonds model and experiment data are compared by simulation model of rectangular cross section beam collision. The results show that the J-C constitutive model derived is in good agreement with the test results, which proves the parameters obtained can well describe the dynamic deformation behavior of DC53D+ZF under high strain rate.

Key words: Collision, Dynamic tensile, Johnson-Cook constitutive model, Simulation, Strain rate

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