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W. Liu, G. Meschke, H.A. Mang:
"A Note on the Algorithmic Stabilization of 2D Contact Analyses";
in: "Proceedings of the Fourth International Conference on Contact Mechanics", WIT Press, 1999, 231 - 240.

This paper addresses a method to avoid slip oscillations of contact nodes resulting from lack of C_1-continuity of finite element discretizations in order to stabilize the contact algorithm for 2D contact analyses. Based on the actual finite element boundary, a virtual boundary with C_1-continuity is established. The respective consistent contact matrix is derived. Selected numerial examples have demonstrated the effectiveness of the method.