000004670 001__ 4670
000004670 005__ 20141119144543.0
000004670 04107 $$aeng
000004670 046__ $$k2002-06-02
000004670 100__ $$aSun, Lizhi
000004670 24500 $$aINFLUENCE OF PARTICLE CRACKING ON PLASTIC BEHAVIOR OF DISCONTINUOUSLY REINFORCED COMPOSITES

000004670 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004670 260__ $$bColumbia University in the City of New York
000004670 506__ $$arestricted
000004670 520__ $$2eng$$aA micromechanics-based elastoplastic and damage constitutive model is proposed to predict the overall mechanical behavior of particle-reinforced metal matrix composites. Unidirectionally aligned spheroidal elastic particles, some of which contain penny-shaped cracks, are randomly distributed in the elastoplastic metal matrix. These imperfect particles, attributed to progressive particle cracking, are modeled by using the double-inclusion concept. An ensemble-volume averaged homogenization procedure is employed to estimate the effective yield function of the damaged composites. The associative plastic flow rule and the hardening law are postulated based on the continuum plasticity theory. The underlying damage evolution of particles is considered in accordance with the Weibull’s statistical function to characterize the varying probability of reinforcement cracking. The elastoplastic mechanical behavior of particulate composites under uniaxial loading condition is simulated and compared with available experimental results.

000004670 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004670 653__ $$aMetal-matrix composites, Plasticity, Micromechanics, Homogenization, Damage mechanics

000004670 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004670 720__ $$aSun, Lizhi$$iLiu, H.T.$$iJu, J.W.
000004670 8560_ $$ffischerc@itam.cas.cz
000004670 8564_ $$s128830$$uhttp://invenio.itam.cas.cz/record/4670/files/142.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004670 962__ $$r4594
000004670 980__ $$aPAPER