## Quasistatic viscoplasticity without safe-load conditions.(English)Zbl 1477.35261

Summary: In the paper we present the existence theory to gradient-type quasistatic models of viscoplasticity. Our goal is to show the reader a new point of view to the existence of solutions to such models where no safe-load conditions are needed. In the classic approach authors use this kind of indirect assumption on data in order to obtain proper energy estimates, in our approach we propose how to omit such safe-load conditions by quite delicate estimates and due to considering a proper approximation of the initial problem.

### MSC:

 35Q74 PDEs in connection with mechanics of deformable solids 74C05 Small-strain, rate-independent theories of plasticity (including rigid-plastic and elasto-plastic materials) 74H20 Existence of solutions of dynamical problems in solid mechanics 35A01 Existence problems for PDEs: global existence, local existence, non-existence
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### References:

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