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The Penalty Free Nitsche Method and Nonconforming Finite Elements for the Signorini Problem

We design and analyse a Nitsche method for contact problems. Compared to the seminal work of Chouly and Hild (A Nitsche-based method for unilateral contact problems: numerical analysis. SIAM J. Numer. Anal. 51 (2013), no. 2) our method is constructed by expressing the contact conditions in a nonlinear function for the displacement variable instead of the lateral forces. The contact condition is then imposed using the nonsymmetric variant of Nitsche's method that does not require a penalty term for stability. Nonconforming piecewise affine elements are considered for the bulk discretization. We prove optimal error estimates in the energy norm.

preprint2016arXivOpen access
Erik BurmanPeter HansboMats G. Larson
math.NA
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Erik BurmanPeter HansboMats G. Larson

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