نتایج جستجو برای: elastoplasticity

تعداد نتایج: 253  

Journal: :International Journal of Solids and Structures 2011

2004
Martin Brokate Carsten Carstensen Jan Valdman

Multi-yield elastoplasticity models a material with more than one plastic state and hence allows for refined approximation of irreversible deformations. Aspects of the mathematical modeling and a proof of unique existence of weak solutions can be found in part I of this paper [BCV04]. In this part II we establish a canonical time-space discretization of the evolution problem and present various...

2002
J. E. Taylor J. E. TAYLOR

This paper deals with a variational model applicable to small-deformation structural analysis expressed for linearly elastic-perfectly plastic (von Mises-Hubcr-Hencky) material. The model comprises a unification of the minimum complementary energy principal, the Haar-von Karman principle for deformation elastoplasticity, and (in a sense) the lower bound theorem of Limit Analysis. Thus it corres...

Journal: :SIAM J. Math. Analysis 2008
Ulisse Stefanelli

We present a variational principle governing the quasistatic evolution of a linearized elastoplastic material. In case of linear hardening, the novel characterization allows to recover and partly extend some known results and proves itself to be especially well-suited for discussing general approximation and convergence issues. In particular, the variational principle is exploited in order to p...

Journal: :Siam Journal on Control and Optimization 2021

We discuss a topology optimization problem for an elastoplastic medium. The distribution of material in region is optimized with respect to given target functional taking into account complianc...

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