Abstract
We establish the global existence and the asymptotic behavior for the 2D incompressible isotropic elastodynamics for sufficiently small, smooth initial data in the Eulerian coordinates formulation. The main tools used to derive the main results are, on the one hand, a modified energy method to derive the energy estimate and, on the other hand, a Fourier transform method with a suitable choice of Z-norm to derive the sharp \(L^\infty \)-estimate. We mention that the global existence of the same system but in the Lagrangian coordinates formulation was recently obtained by Lei (Global well-posedness of incompressible Elastodynamics in 2D, 2014). Our goal is to improve the understanding of the behavior of solutions. Also, we present a different approach to study 2D nonlinear wave equations from the point of view in frequency space.
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Communicated by Nader Masmoudi.
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Wang, X. Global Existence for the 2D Incompressible Isotropic Elastodynamics for Small Initial Data. Ann. Henri Poincaré 18, 1213–1267 (2017). https://doi.org/10.1007/s00023-016-0538-x
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DOI: https://doi.org/10.1007/s00023-016-0538-x