应用直接法求解拉延筋约束力

吉林大学学报(工学版) ›› 2003, Vol. ›› Issue (1): 92-97.

应用直接法求解拉延筋约束力

朱勇建¹, 那景新², 闫亚坤¹, 胡平¹

1. 吉林大学, 机械科学与工程学院, 吉林长春 130025;
2. 吉林大学, 汽车工程学院, 吉林长春 130025

收稿日期:2002-06-30

A Direct Method for Extracting the Drawbead Restrain Forces

ZHU Yong-jian¹, NA Jing-xin², YAN Ya-kun¹, HU Ping ¹

1. College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China;
2. College of Automobile Engineering, Jilin University, Changchun 130025, China

Received:2002-06-30

摘要/Abstract

摘要： 结合板料冲压计算机模拟的实际情况,改进了李东升^[1]等人提出的拉延筋约束力求解模型。在板料成形模拟过程中采用弹塑性本构方程,推导出塑性状态下应力应变关系。考虑厚向各向异性、应变率、弹性力和应变硬化的影响,根据平面应变假设采用弹塑性幂次强化模型求解拉延筋约束阻力,并将结果与试验值对比,从而验证了此改进方法的有效性。

关键词: 拉延筋约束力, 厚向各向异性, 应变硬化

Abstract: According to the method presented by Li Dong sheng etc.^[1],we make use of power model of strengthening to develop the relation between stress and strain.The Bauschinger effect and the normal anisotropy and strain rate sensitivity to establish the model for solving the drawbead restrain forces.The results computed by this model are compared with those obtained by experiment.

Key words: drawbead restrain force, normal anisotropy, strain hardening

中图分类号:

O344.3

朱勇建, 那景新, 闫亚坤, 胡平. 应用直接法求解拉延筋约束力[J]. 吉林大学学报(工学版), 2003, (1): 92-97.

ZHU Yong-jian, NA Jing-xin, YAN Ya-kun, HU Ping . A Direct Method for Extracting the Drawbead Restrain Forces[J]. 吉林大学学报(工学版), 2003, (1): 92-97.

参考文献

[1] 李东升,黄小明,胡世光.汽车覆盖件成形中拉延筋约束力的模拟计算［J］.塑性工程学报,1994,1:59～65.
[2] Wang N M.A mathematical model of drawbead forces in sheet metal forming［J］.J.Appl.Metalworking,1982,2:193～199.
[3] Stoughton T B.Model of drawbead forces in sheet metal forming［Z］.Proc.of 15th Biennial IDDRG Cong.Dearborn.MI,1998.
[4] 徐丙坤,施法中.拉延筋约束阻力的一种解析计算方法［J］.锻压技术,2001,6:11～13.
[5] Nine H D.The applicability of coulomb′s friction law to drawbeads in sgeet metal forming［J］.J.Applied Metalworking,1982,2(3):200～210.
[6] 梁炳文,胡世光.板料成形塑性理论［M］.北京:机械工业出版社,1987.
[7] 余同希.塑性力学［M］.北京:高等教育出版社,1989.

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