Abstract
Classes of deformations in nonlinear elastodynamics with origin in pioneering work of Carroll are investigated for an isotropic elastic solid subject to body forces corresponding to a nonlinear substrate potential. Exact solutions are obtained which, inter alia, are descriptive of the propagation of compact waves and motions with oscillatory spatial dependence. It is shown that a description of slowly modulated waves leads to a novel class of generalized nonlinear Schrödinger equations. The latter class, in general, is not integrable. However, a procedure is presented whereby integrable Hamiltonian subsystems may be isolated for a broad class of deformations.
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