# Adaptive inexact semismooth Newton methods for the contact problem between two membranes

* Corresponding author
Abstract : We propose an adaptive inexact version of a class of semismooth Newton methods. As a model problem, we study the system of variational inequalities describing the contact between two membranes. This problem is discretized with conforming finite elements of order $p \geq 1$, yielding a nonlinear algebraic system of variational inequalities. We consider any iterative semismooth linearization algorithm like the Newton-min or the Newton--Fischer--Burmeister which we complement by any iterative linear algebraic solver. We then derive an a posteriori estimate on the error between the exact solution and the approximate solution which is valid at any step of the linearization and algebraic resolutions. Our estimate is based on flux reconstructions in discrete subspaces of $\mathbf{H}(\mathrm{div}, \Omega)$ and on potential reconstructions in discrete subspaces of $H^1(\Omega)$ satisfying the constraints. It distinguishes the discretization, linearization, and algebraic components of the error. Consequently, we can formulate adaptive stopping criteria for both solvers, giving rise to an adaptive version of the considered inexact semismooth Newton algorithm. Under these criteria, the efficiency of our estimates is also established, meaning that we prove them equivalent with the error up to a generic constant, except for a typically small contact term. Numerical experiments for the Newton-min algorithm in combination with the GMRES algebraic solver confirm the efficiency of the developed adaptive method.
Keywords :
Document type :
Preprints, Working Papers, ...
Liste complète des métadonnées

https://hal.inria.fr/hal-01666845
Contributor : Jad Dabaghi <>
Submitted on : Friday, October 19, 2018 - 5:33:43 PM
Last modification on : Friday, April 19, 2019 - 4:55:28 PM

### File

paper.pdf
Files produced by the author(s)

### Identifiers

• HAL Id : hal-01666845, version 2

### Citation

Jad Dabaghi, Vincent Martin, Martin Vohralík. Adaptive inexact semismooth Newton methods for the contact problem between two membranes. 2018. ⟨hal-01666845v2⟩

Record views