000004729 001__ 4729
000004729 005__ 20141119144548.0
000004729 04107 $$aeng
000004729 046__ $$k2002-06-02
000004729 100__ $$aJu, J. W.
000004729 24500 $$aEFFECTIVE ELASTOPLASTIC DAMAGE MODEL FOR FIBER REINFORCED METAL MATRIX COMPOSITES WITH EVOLUTIONARY COMPLETE FIBER DEBONDING

000004729 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004729 260__ $$bColumbia University in the City of New York
000004729 506__ $$arestricted
000004729 520__ $$2eng$$aA micromechanical damage model is proposed to predict the overall elastoplastic behavior and interfacial damage evolution of fiber-reinforced metal matrix composites. Progressive, completely debonded fibers are replaced by voids. The effective elastic moduli of three-phase composites, composed of a ductile matrix, randomly located and unidirectionally aligned circular fibers, and voids, are derived by using a micromechanical formulation. In order to characterize the overall elastoplastic behavior, an effective yield criterion is derived based on the ensemble-area averaging process and the first-order effects of eigenstrains. The proposed effective yield criterion, together with the overall associative plastic flow rule and the hardening law, constitutes the analytical framework for the estimation of effective elastoplastic responses of metal matrix composites containing both perfectly bonded and completely debonded fibers. An evolutionary interfacial fiber debonding process, governed by the internal stresses of fibers and the interfacial strength, is incorporated. Further, the Weibull's statistical function is employed to describe the varying probability of complete fiber debonding. Finally, comparison between the present predictions and available experimental data and various numerical simulations are performed.

000004729 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004729 653__ $$aMetal matrix composites, randomly located fibers, evolutionary debonding, effective elastoplasticity, damage model.

000004729 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004729 720__ $$aJu, J. W.$$iRuan, H. N.
000004729 8560_ $$ffischerc@itam.cas.cz
000004729 8564_ $$s77666$$uhttp://invenio.itam.cas.cz/record/4729/files/237.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004729 962__ $$r4594
000004729 980__ $$aPAPER