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Clamped elastic-ideally plastic beams and Prandtl-Ishlinskii hysteresis operators
We consider a model for one-dimensional transversal oscillations of
an elastic-ideally plastic beam. It is based on the von Mises model
of plasticity and leads after a dimensional reduction to a
fourth-order partial differential equation with a hysteresis
operator of Prandtl-Ishlinskii type whose weight function is given
explicitly. In this paper, we study the case of clamped beams
involving a kinematic hardening in the stress-strain relation. As
main result, we prove the existence and uniqueness of a weak
solution. The method of proof, based on spatially semidiscrete
approximations, strongly relies on energy dissipation properties of
one-dimensional hysteresis operators.