• CN:11-2187/TH
  • ISSN:0577-6686

›› 2000, Vol. 36 ›› Issue (2): 73-75.

• 论文 • 上一篇    下一篇

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基于晶体学理论预测金属薄板屈服行为和成形极限

连建设;刘守荣;陈积伟   

  1. 吉林工业大学材料科学与工程学院
  • 发布日期:2000-02-15

PREDICTION OF YIELD BEHAVIOR AND FORMING LIMIT OF SHEET METAL BASED ON POLYCRYSTALLINE PLASTICITY THEORY

Lian Jianshe;Liu Shourong;Chen Jiwei   

  1. Jilin University of Technology
  • Published:2000-02-15

摘要: 应用Taylor理论模拟了体心立方(BCC)和面心立方(FCC)金属在平面应力条件下的各向同性屈服行为。将计算结果与Barlat-Lian提出的屈服函数进行了比较,从微观角度讨论了宏观屈服函数的相关参数,然后结合描述塑性失稳的改进M-K理论,选择屈服函数的相关参数,预测了A-K steel和2036-T4铝合金板的成形极限(FLD),通过与试验结果比较,确定了相关参数的最佳选择。

关键词: 成形极限, 晶体学理论, 屈服表面

Abstract: The isotropic yield behaviors of BCC and FCC metals under plane stress condition are simulated with the Taylor theory. The results are compared with a proposed yield function (Barlat-Lian yield function) in order to determine its parameter. Then the yield function with the correct parameter choice is incorporated with the M-K model to predict the forming limit of sheets, and to compare with a steel and an aluminum alloys, which gives good agreements with experiments.

Key words: Forming limit, Polycrystalline slip, Yield surface

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