000004678 001__ 4678
000004678 005__ 20141119144544.0
000004678 04107 $$aeng
000004678 046__ $$k2002-06-02
000004678 100__ $$aVoyiadjis, George Z.
000004678 24500 $$aNONLOCAL PLASTICITY FORMULATION INCORPORATING GRADIENT OF KINEMATIC HARDENING

000004678 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004678 260__ $$bColumbia University in the City of New York
000004678 506__ $$arestricted
000004678 520__ $$2eng$$aIn this proposed work, nonlocal behavior is introduced through the second gradient of kinematic hardening models in order to introduce a microstructural characteristic length into the model and in order to introduce long-range microstructural interactions that allow the response of a material point to depend on the state of its neighborhood in addition to the state of the point itself. It is intended to develop a consistent and systematic framework for the gradient approach that will enable one to better understand the nonlocal effects of material inhomogeneity on the macroscopic behavior and the material instabilities. The internal state variables and the corresponding gradient terms are assumed to be independent internal state variables with respect to each other with different physical interpretations and initial conditions which allows these two different physical phenomena to be identified separately. The second order gradient of the kinematic hardening is introduced through the Helmholtz free energy and through the plastic potential function. Computational issues of the gradient approach are introduced in a form that can be applied using the finite element approach.

000004678 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004678 653__ $$anonlocal, gradient, plasticity

000004678 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004678 720__ $$aVoyiadjis, George Z.$$iDorgan, Robert J.
000004678 8560_ $$ffischerc@itam.cas.cz
000004678 8564_ $$s516202$$uhttps://invenio.itam.cas.cz/record/4678/files/155.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004678 962__ $$r4594
000004678 980__ $$aPAPER