WIAS Preprint No. 2074, (2015)

A phase field approach for optimal boundary control of damage processes in two-dimensional viscoelastic media



Authors

  • Farshbaf Shaker, Mohammad Hassan
  • Heinemann, Christian

2010 Mathematics Subject Classification

  • 35Q74 49J20 35A01 35A02 35D35 35M33 35M87 74A45 74D10 74F99 74H20 74H25 74P99

Keywords

  • damage processes, phase field model, viscoelasticity, nonlinear parabolic inclusions, well-posedness, optimal control

DOI

10.20347/WIAS.PREPRINT.2074

Abstract

In this work we investigate a phase field model for damage processes in two-dimensional viscoelastic media with nonhomogeneous Neumann data describing external boundary forces. In the first part we establish global-in-time existence, uniqueness, a priori estimates and continuous dependence of strong solutions on the data. The main difficulty is caused by the irreversibility of the phase field variable which results in a constrained PDE system. In the last part we consider an optimal control problem where a cost functional penalizes maximal deviations from prescribed damage profiles. The goal is to minimize the cost functional with respect to exterior forces acting on the boundary which play the role of the control variable in the considered model. To this end, we prove existence of minimizers and study a family of "local'' approximations via adapted cost functionals.

Appeared in

  • Math. Models Methods Appl. Sci., 25 (2015) pp. 2749--2793.

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