北京航空航天大学学报 ›› 2008, Vol. 34 ›› Issue (09): 1088-1091.

• 论文 • 上一篇    下一篇

环件径向冷轧塑性变形及残余应力分布仿真

赵晓慈,张以都,张洪伟   

  1. 北京航空航天大学 机械工程及自动化学院, 北京 100191
  • 收稿日期:2007-09-13 出版日期:2008-09-30 发布日期:2010-09-17
  • 作者简介:赵晓慈(1979-),女,江苏大丰人,博士生, skyzh@me.buaa.edu.cn.
  • 基金资助:

    航空"十五"支撑技术资助项目(B2120061326)

Simulation analysis of plastic deformation and residual stress distribution of radial ring rolling

Zhao Xiaoci, Zhang Yidu, Zhang Hongwei   

  1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2007-09-13 Online:2008-09-30 Published:2010-09-17

摘要: 为了消除环件冷轧过程中产生的残余应力,采用弹塑性大变形有限元法对环件径向冷轧过程进行仿真.研究揭示了矩形截面铝合金环件径向冷轧工艺中总压下量不变时,芯辊进给速度对环件塑性变形大小及分布规律的影响.结果表明:进给速度相对较小时,环件鱼尾形状系数较大,随着进给速度进一步增大,鱼尾形状系数反而减小.根据塑性变形的不一致性产生残余应力的原理,进一步分析由此塑性变形规律形成的残余应力分布情况,从而为消除冷轧后残余应力提供理论依据.

Abstract: To eliminate the residual stress formed during the process of ring rolling, the radial ring rolling was simulated by elas-plastics large deformation finite element analysis. Al alloy rings with rectangular cross-section were adopted as workpieces and total depressing amounts of mandrel with different feed velocities were identical. Magnitude and distribution of plastic deformation in different feed velocity of mandrel were studied. The simulated results show that the fishtail shape coefficient is high when the feed velocity is relatively low and will be reduced with increase of feed velocity. According to the mechanism that inconsistent plastic deformation is the cause of residual stress, the corresponding residual stress distribution of radial ring rolling was analyzed. The research provides foundation for the residual stress relief study.

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