Lp-asymptotic stability analysis of a 1D wave equation with a nonlinear damping

This paper is concerned with the asymptotic stability analysis of a one dimensional wave equation with Dirichlet boundary conditions subject to a nonlinear distributed damping within an L-p functional frame- work, rho is an element of [2, infinity]. Some well-posedness results are provided together with exponential decay to zero of trajectories, with an estimation of the decay rate. The well-posedness results are proved by considering an appropriate energy functional in the appropriate functional spaces and introduced by Haraux in [A. Haraux, Int. J. Math. Modelling Num. Opt., 2009]. The asymptotic behavior analysis is based on an attractivity result of a trajectory of an infinite-dimensional linear time-varying system with a special structure, which relies on the introduction of a suitable Lyapunov functional. Note that some of the results of this paper apply for a large class of nonmonotone dampings. (c) 2020 Elsevier Inc. All rights reserved.