TRANSVERSE MECHANICS OF UNIDIRECTIONAL TEXTILE FIBROUS MATERIALS

摘要

Transverse behaviors of unidirectional materials such as fibers have been studied for a long time, either from a theoretical or an experimental way. However those studies are majoritarily focused on monofilaments; too few of these investigated on tows' transverse behavior, even less concerning tows used in composite materials. Several studies developed analytic models describing transverse compression behavior of fibers assemblies. One of the earliest work was the study of Van Wyk's, in 1946. He proposes an analytic model for the compression of randomly oriented wool fibers; without favoured directions contrary to the tows. Trying to respond to this limitation, Komori and Makishima expanded Van Wyk's ideas by derivating the equation and calculating the number of contacts within the randomly oriented fibers assembly. However, experimental and theoretical studies available in the literature do not reflect the impact that some geometrical and mechanical characteristics might have on tows' transversal behavior.