An Approximation of Solutions for the Problem with Quasistatic Contact in the Case of Dry Friction

Nicolae Pop, Miorita Ungureanu and Adrian I. Pop
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Nicolae Pop: Institute of Solid Mechanics of Romanian Academy, Constantin Mille Str. 15, 010141 Bucharest, Romania
Miorita Ungureanu: North University Centre at Baia Mare, Faculty of Engineering, Technical University of Cluj Napoca, V. Babes Str. 62, 430083 Baia Mare, Romania
Adrian I. Pop: North University Centre at Baia Mare, Faculty of Engineering, Technical University of Cluj Napoca, V. Babes Str. 62, 430083 Baia Mare, Romania

Mathematics, 2021, vol. 9, issue 8, 1-10

Abstract: In this paper, we discuss the question of finding an optimal control for the solutions of the problem with dry friction quasistatic contact, in the case that the friction law is modeled by a nonlocal version of Coulomb’s law. In order to get the necessary optimality conditions, we use some regularization techniques, and this leads us to a problem of control for an inequality of the variational type. The optimal control problem consists, in our case, of minimizing a sequence of optimal control problems, where the control variable is given by a Neumann-type boundary condition. The state system is represented by a limit of a sequence, whose terms are obtained from the discretization, in time with finite difference and space with the finite element method of a regularized quasistatic contact problem with Coulomb friction. The purpose of this optimal control problem is that the traction force (the control variable) acting on one side of the boundary (the Neumann boundary condition) of the elastic body produces a displacement field (the state system solution) close enough to the imposed displacement field, and the traction force from the boundary remains small enough.

Keywords: unilateral quasistatic contact problem; finite element method; finite difference; Coulomb law; boundary control; regularized optimal (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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