000004668 001__ 4668
000004668 005__ 20141119144543.0
000004668 04107 $$aeng
000004668 046__ $$k2002-06-02
000004668 100__ $$aZhong, X. Allan
000004668 24500 $$aINFLUENCE OF GEOMETRICAL FEATURES OF UNIDIRECTIONAL FIBROUS LAMINA ON ITS TRANSVERSE RESPONSES

000004668 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004668 260__ $$bColumbia University in the City of New York
000004668 506__ $$arestricted
000004668 520__ $$2eng$$aDimensional analysis is used in this study to establish general relations between geometric features of unidirectional fibrous lamina and the corresponding transverse responses, including transverse modulus and stress distribution in the matrix. Prediction of transverse response of unidirectional fibrous lamina was made long ago, e.g. the Halpin-Tsai equations. However, specific geometrical features of such composites are typically lumped into the volume fraction of fibers. Using micromechanics via explicit representation of fibers, it is demonstrated explicitly in this paper that the transverse response is dependent on two geometrical parameters, one is the usual fiber volume fraction, and the other is the ratio of fiber diameter to fiber spacing. A new formula for prediction of transverse response of the composite is established based on linear elastic finite element analysis. The new formula is validated via lab test data. The formula is extended to nonlinear analysis by integrating nonlinear matrix behavior in a separable way under certain restrictions. It is also demonstrated that the stress distribution in the matrix and the location of peak stress changes with the aforementioned ratio when fiber diameter and thickness are fixed. The effect of random fiber spacing is also investigated.

000004668 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004668 653__ $$acomposite geometry, unidirectional lamina, transverse response, dimensional analysis, linear elasticity, and hyperelasticity.

000004668 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004668 720__ $$aZhong, X. Allan$$iPadovan, Joe
000004668 8560_ $$ffischerc@itam.cas.cz
000004668 8564_ $$s199191$$uhttps://invenio.itam.cas.cz/record/4668/files/140.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004668 962__ $$r4594
000004668 980__ $$aPAPER