Applied Mathematics and Mechanics (English Edition) ›› 2015, Vol. 36 ›› Issue (8): 1005-1016.doi: https://doi.org/10.1007/s10483-015-1962-7

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Theoretical analysis on quasi-static lateral compression of elliptical tube between two rigid plates

Ruirui LIU1,2, Haibo WANG1, Jialing YANG1, Hua LIU1, Yuxin SUN1   

  1. 1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;
    2. Jiuquan Satellite Launch Center, Jiuquan 732750, Gansu Province, China
  • 收稿日期:2014-09-05 修回日期:2015-05-13 出版日期:2015-08-01 发布日期:2015-08-01
  • 通讯作者: Hua LIU E-mail:liuhuarui@buaa.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (No. 11472035)

Theoretical analysis on quasi-static lateral compression of elliptical tube between two rigid plates

Ruirui LIU1,2, Haibo WANG1, Jialing YANG1, Hua LIU1, Yuxin SUN1   

  1. 1. School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;
    2. Jiuquan Satellite Launch Center, Jiuquan 732750, Gansu Province, China
  • Received:2014-09-05 Revised:2015-05-13 Online:2015-08-01 Published:2015-08-01
  • Contact: Hua LIU E-mail:liuhuarui@buaa.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (No. 11472035)

摘要: Based on the rigid plastic theory, the load-deflection functions with and without considering the effect of strain hardening are respectively derived for an elliptical tube under quasi-static compression by two parallel rigid plates. The non-dimensional load-deflection responses predicted by the present theory and the finite element simulations are compared, and the favorable agreement is found. The results show that strain hardening may have a noticeable influence on the load-deflection curves of an elliptical tube under quasi-static compression. Compared with the circular counterpart, the elliptical tube exhibits different energy absorption behavior due to the difference between the major axis and the minor axis. When loaded along the major axis of a slightly oval tube, a relative even and long plateau region of the load-deflection curve is achieved, which is especially desirable for the design of energy absorbers.

关键词: strain hardening, ovality, quasi-static, lateral compression, elliptical tube

Abstract: Based on the rigid plastic theory, the load-deflection functions with and without considering the effect of strain hardening are respectively derived for an elliptical tube under quasi-static compression by two parallel rigid plates. The non-dimensional load-deflection responses predicted by the present theory and the finite element simulations are compared, and the favorable agreement is found. The results show that strain hardening may have a noticeable influence on the load-deflection curves of an elliptical tube under quasi-static compression. Compared with the circular counterpart, the elliptical tube exhibits different energy absorption behavior due to the difference between the major axis and the minor axis. When loaded along the major axis of a slightly oval tube, a relative even and long plateau region of the load-deflection curve is achieved, which is especially desirable for the design of energy absorbers.

Key words: elliptical tube, quasi-static, strain hardening, ovality, lateral compression

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