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arXiv · 1708.01455

A globally convergent filter-trust-region method for large deformation contact problems

Jonathan Youett·Oliver Sander·Ralf Kornhuber
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Abstract

We present a globally convergent method for the solution of frictionless large deformation contact problems for hyperelastic materials. The discretisation uses the mortar method which is known to be more stable than node-to-segment approaches. The resulting non-convex constrained minimisation problems are solved using a filter-trust-region scheme, and we prove global convergence towards first-order optimal points. The constrained Newton problems are solved robustly and efficiently using a Truncated Non-smooth Newton Multigrid (TNNMG) method with a Monotone Multigrid (MMG) linear correction step. For this we introduce a cheap basis transformation that decouples the contact constraints. Numerical experiments confirm the stability and efficiency of our approach.

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Jonathan Youett, Oliver Sander, Ralf Kornhuber. 2017-08-04. A globally convergent filter-trust-region method for large deformation contact problems. https://arxiv.org/abs/1708.01455

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