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力学与实践 ›› 2004, Vol. 26 ›› Issue (6): 0-0.doi: 10.6052/1000-0992-2003-366

• 应用研究 •    

偏心率效应对金属圆柱管轴压性能的影响

宋宏伟 杜星文 范子杰   

  1. 清华大学汽车系,汽车安全与节能国家重点实验室 哈尔滨工业大学复合材料研究所 清华大学汽车系,汽车安全与节能国家重点实验室
  • 收稿日期:2003-09-16 修回日期:1900-01-01 出版日期:2004-12-10 发布日期:2004-12-10

EFFECT OF ECCENTRICITY ON THE AXIAL CRUSHING BEHAVIOR OF ROUND METAL TUBES

  • Received:2003-09-16 Revised:1900-01-01 Online:2004-12-10 Published:2004-12-10

摘要: 用含有偏心率因子的直链塑性铰叠缩模型来分析金属圆柱管轴向压缩能量吸收,根据能 量原理推导了瞬时载荷,从而获得压缩过程的载荷-位移曲线. 讨论了偏心率对平均压缩载 荷和载荷-位移曲线形貌的影响. 实验结果与模型分析符合得很好.

关键词: 金属管,轴向压缩,能量吸收,, 刚塑性,偏心率

Abstract: The classical problem of a round metal tube subjected to axial compressive loading was reexamined with the straight plastic hinge model including an eccentricity factor. Based on the energy equilibrium, the instantaneous load-displacement history was obtained. The influence of eccentricity on the configuration of load-displacement and mean crush load was discussed. The model reproduces enough experimental information.

Key words: metal tube, axial crushing, energy absorption,, rigid plastic eccentricity