OS0121 繊維配向に小規模変動をともなうグリーンコンポジットの引張強度特性

Abstract

This paper describes the effect of fiber orientation fluctuation on tensile strength of a green composite reinforced with slivers of flax fibers. To quantify the morphology of the fiber orientation, fiber orientation angles were measured on fine segments, divided into 1 mm × 1 mm squares on a photograph of the whole composite surface. The tensile strength obtained here did not show any appreciable relation to the average of measured fiber orientation angles. The concept of two-dimensional (2D) autocorrelation was used in the present study to express the degree of similarity between fiber orientation angles in two different local areas. Results show that, if high 2D autocorrelation coefficients occupy more area on a composite surface, then this composite possesses more regular fiber orientation and tends to exhibit higher tensile strength.