1. Cha, C. S., Kang, J. Y. and Yang, I. Y. 2001, “Axial Impact Collapse Analysis of Spot Welded Hat Shaped Section Members,”KSME International Journal, Vol. 15, No. 2, pp. 180–191.
2. Grzebieta, R. H. and Murray, N. W., 1986, “Energy Absorpotion of an Initially Imperfect Strut Subjected to an Impact Load,”International Journal Impact Engineering, Vol. 4, No. 4, pp. 147–159.
3. Jonse, N., 1989, Structural impact, Cambridge University Press, pp. 403–405.
4. Livermore Software Technology Corporation, 1993,LS-DYNA3D Theoretical Manual, pp. 6.1–6.10.
5. Livermore Software Technology Corporation, 1997,LS-DYNA User’s Manual.