Transient three-dimensional contact problems: mortar method. Mixed methods and conserving integration

Authors:
Christian Hesch;Peter Betsch
Affiliations:
Chair of Computational Mechanics, Department of Mechanical Engineering, University of Siegen, Siegen, Germany;Chair of Computational Mechanics, Department of Mechanical Engineering, University of Siegen, Siegen, Germany
Venue:
Computational Mechanics
Year:
2011

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Abstract

The present work deals with the development of an energy-momentum conserving method to unilateral contact constraints and is a direct continuation of a previous work (Hesch and Betsch in Comput Mech 2011, doi: 10.1007/s00466-011-0597-2 ) dealing with the NTS method. In this work, we introduce the mortar method and a newly developed segmentation process for the consistent integration of the contact interface. For the application of the energy-momentum approach to mortar constraints, we extend an approach based on a mixed formulation to the segment definition of the mortar constraints. The enhanced numerical stability of the newly proposed discretization method will be shown in several examples.