Advertisement

Acta Mechanica Solida Sinica

, Volume 19, Issue 2, pp 135–140 | Cite as

A study on the counter-intuitive behaviors of pin-ended beams under projectile impact

  • Haiwang Li
  • Dongqi Qin
Article

Abstract

The counter-intuitive behaviors of pin-ended beams under the projectile impact are investigated with ANSYS/LS-DYNA in this paper. It studies in detail their displacement-time history curves, final deformed shapes, energy relationships and projectile impact velocity ranges related to their counter-intuitive behaviors. The influences of the impact positions on their counterintuitive behaviors are also discussed. The results show that no matter where the impact position on the beam is, the counter-intuitive behaviors of pinned beams will occur as long as the impacting velocity lies within a proper range. Corresponding to the occurring of the counter-intuitive behaviors, the rebounding number in the displacement history curves of the beams decreases from a few times to zero with an increase of the impact velocity. The final deformation modes of the beam corresponding to the counter-intuitive behaviors will appear in symmetrical and unsymmetrical forms no matter where the impact position is; the impact velocity of the first-occurring of the counter-intuitive behaviors of the beam increases slowly with the deviation of the impact position away from the mid-span.

Key words

solid mechanics counter-intuitive behaviors numerical analysis pin-ended beam projectile impact impact velocity 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Symonds, P.S. and Yu, T.X., Counterintuitive behavior in a problem of elastic-plastic beam dynamics, Journal of Applied Mechanics, Vol.52, 1989, 517–522.CrossRefGoogle Scholar
  2. [2]
    Borino, G., Perego, U. and Symonds, P.S., An energy approach to anomalous damped elastic-plastic response to short pulse loading, Journal of Applied Mechanics, Vol.56, 1991, 430–438.CrossRefGoogle Scholar
  3. [3]
    Li, Q.M., Zhao, L.M. and Yang, G.T., Experimental results on the counter-intuitive behavior of thin clamped beams subjected to projectile impact, International Journal of Impact Engineering, Vol.11, 1991, 341–348.CrossRefGoogle Scholar
  4. [4]
    Xi, F., Yang, J.L. and Li, Z.L., Anomalous behavior revisited: dynamic response of elastic-plastic structures, Acta Mechanica Solida Sinica, Vol.20, No.2, 1999, 113–122 (in Chinese).Google Scholar
  5. [5]
    Lee, J.Y., Symonds, P.S. and Borino, G., Chaotic response of a two-degree-of freedom elastic-plastic beam model to short pulse loading, Journal of Applied Mechanics, Vol.59, 1992, 711–721.CrossRefGoogle Scholar
  6. [6]
    Koisky, H., Rush, P. and Symonds, P.S., Some experimental observation of anomalous response of fully clamped beams, International Journal of Impact Engineering, Vol.11, 1991, 445–456.CrossRefGoogle Scholar
  7. [7]
    Wu, G.Y., Qin, D.Q. and Yang, G.T., A numerical analysis on counter-intuitive behaviors of elasto-plastic circle plates under impact, Acta Mechanica Solida Sinica, Vol.25, No.4, 2004, 389–393 (in Chinese).Google Scholar
  8. [8]
    Li, H.W. and Qin, D.Q., A study of the effect of loading patterns and areas on anomalous response of elastic-plastic plates, Explosion and shock waves, Vol.25, No.1, 2005, 35–40 (in Chinese).Google Scholar

Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2006

Authors and Affiliations

  1. 1.Department of Civil EngineeringTaiyuan University of TechnologyTaiyuanChina

Personalised recommendations