000004149 001__ 4149
000004149 005__ 20141118153334.0
000004149 04107 $$acze
000004149 046__ $$k2004-05-10
000004149 100__ $$aVavřík, D.
000004149 24500 $$aExperimental-numerical evaluation of the surface plastic strain evolution

000004149 24630 $$n10.$$pEngineering Mechanics 2004
000004149 260__ $$bInstitute of Thermomechanics AS CR, v.v.i., Prague
000004149 506__ $$arestricted
000004149 520__ $$2eng$$aThe subject of this work is implementation of the incremental Prager-Ziegler plasticity theory for experimental results acquired by the “Method of Interpolated Ellipses” (MIE). The MIE is a technique based on an optical monitoring of deformations during loading processes of hexagonal grids of dots deposited on the surface of the monitored specimen. Loading deforms a circle on the specimen surface into an ellipse. Knowledge of the ellipse parameters directly yields the magnitude and the direction of principal strains. The principal strain evolution yields knowledge of evolution of the plastic strain field by numerical post processing. The commonly used power low plasticity theory has strong condition of proportional loading for its use. This condition isn’t usually fulfilled for high ductile body with a stress concentrator. Therefore the incremental Prager-Ziegler plasticity theory was implemented. Evaluated increments of plastic strain field show surprising results for aluminium specimens used. Besides non-proportional plastic strain evolution, plastic work rate exhibited substantial discontinuous character.

000004149 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004149 653__ $$a

000004149 7112_ $$aEngineering Mechanics 2004$$cSvratka (CZ)$$d2004-05-10 / 2004-05-13$$gEM2004
000004149 720__ $$aVavřík, D.$$iJakůbek, J.
000004149 8560_ $$ffischerc@itam.cas.cz
000004149 8564_ $$s997468$$uhttps://invenio.itam.cas.cz/record/4149/files/T-Vavrik-Daniel.pdf$$y
             Original version of the author's contribution as presented on CD, .
            
000004149 962__ $$r4009
000004149 980__ $$aPAPER