A mortar-based frictional contact formulation for large deformations using Lagrange multipliers

• Published in: Computer methods in applied mechanics and engineering Vol. 198; no. 37; pp. 2860 - 2873
• Main Authors: Tur, M., Fuenmayor, F.J., Wriggers, P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-08-2009; Elsevier
• Subjects: Computational techniques; Contact; Exact sciences and technology; Friction; Fundamental areas of phenomenology (including applications); Lagrange multiplier; Large sliding; Mathematical methods in physics; Mechanical contact (friction...); Mortar method; Physics; Solid mechanics; Structural and continuum mechanics; Lagrange multiplier; Mortar method; Large sliding; Friction; Contact; High strain; Numerical integration; Mechanical contact; Mortar element method; Modeling; Contact surface; Quadrature; Virtual work principle; Contact stress; Convergence rate; Non linear effect; Newton method; Sliding friction; Mesh generation; Linearization
• ISSN: 0045-7825; 1879-2138
• DOI: 10.1016/j.cma.2009.04.007

In this work a Lagrange multiplier method is proposed to solve 2D Coulomb frictional contact problems in the context of large deformations. As the proposed formulation is based on the mortar method, the constraints are imposed in a weak integral sense along the contact surface. In order to compute the contact integrals, we use a numerical integration based on the definition of the kinematical variables (gap, slip and their variations) at the quadrature points. The linearization of non-linear equations (virtual work and contact constraints) is developed in order to apply a Newton’s method. The examples show that the numerical integration still preserves the optimal rate of convergence of the finite element solution.