000004676 001__ 4676
000004676 005__ 20141119144544.0
000004676 04107 $$aeng
000004676 046__ $$k2002-06-02
000004676 100__ $$aZeman, Jan
000004676 24500 $$aNONLINEAR ANALYSIS OF WOVEN COMPOSITES WITH REINFORCEMENT IMPERFECTIONS

000004676 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004676 260__ $$bColumbia University in the City of New York
000004676 506__ $$arestricted
000004676 520__ $$2eng$$aA simple procedure is presented for the determination of a Periodic Unit Cell (PUC) for plain weave fabric composites with reinforcement imperfections. The objective is to determine selected geometrical parameters of the PUC so that the PUC resembles the real geometry of a composite, obtained from digitized micrographs of plain weave cross-sections and horizontal projections, as close as possible. Two different approaches to judge the quality of equivalent periodic unit cells are proposed and the optimization procedure for the derivation of PUC parameters is outlined. In the first approach, the optimal periodic unit cell is found by matching binary imagines of the real material and the PUC. In the second approach, the procedure searches for an optimal PUC witch is statistically equivalent to the real microstructure up to two-point probability function. Once the desired geometrical parameters are found, the Finite Element model of a woven composite is formulated and used to predict the overall elastic response of the composite by a homogenization method. An extension to the modeling of inelastic response of the composite subjected to moderate loads is also discussed.

000004676 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004676 653__ $$abinary image, plain weave fabric composite, periodic unit cell, optimization, homogenization, non-linear viscoelasticity

000004676 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004676 720__ $$aZeman, Jan$$iŠejnoha, Michal
000004676 8560_ $$ffischerc@itam.cas.cz
000004676 8564_ $$s319936$$uhttps://invenio.itam.cas.cz/record/4676/files/152.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004676 962__ $$r4594
000004676 980__ $$aPAPER