｛求助｝急寻以下几篇文章

caoyanhui

Peric, D. and Owen, D.R.J., "Computational Model for 3-D Contact Problems with Friction Based on the Penalty Method", International Journal for Numercial Method in Engineering, Vol. 35, pp. 1289-1309 (1992).

Cescotto, S. and Charilier, R., "Frictional Contact Finite Elements Based on Mixed Variational Principles", International Journal for Numercial Method in Engineering, Vol. 36, pp. 1681-1701 (1992).

Cescotto, S. and Zhu, Y.Y., "Large Strain Dynamic Analysis Using Solid and Contact Finite Elements Based on a Mixed Formulation - Application to Metalforming", Journal of Metals Processing Technology, Vol. 45, pp. 657-663 (1994).

Simo, J.C. and Laursen, T.A., "An Augmented Lagrangian Treatment of Contact Problems Involving Friction", Computers and Structures, Vol. 42, No. 1, pp. 97-116 (1992).

Laursen, T.A. and Simo, J.C., "Algorithmic Symmetrization of Coulomb Frictional Problems Using Augmented Lagrangians", Computers Methods in Applied Mechanics and Engineering, Vol. 108, No. 1 & 2, pp. 133-146 (1993).

哪位好心人有以上的文章，能否发给在下一份，不胜感激！！！
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