繊維強化形複合材料の強度信頼性に関わる界面はく離の役割 : モンテカルロ・シミュレーションによる検討

概要

論文の詳細を見る
A Monte-Carlo simulation technique based on a finite element method was developed in order to analyze the strength of a fiber-reinforced plastic matrix composite. The proposed technique can be used to predict approximately the tensile strength distribution of a boron/epoxy monolayer composite obtained experimentally. The effect of the interfacial shear strength on the strength and reliability of boron/epoxy monolayer composites was investigated, using the proposed technique. The results showed that small and large interfacial shear strengths lowered the average tensile strength, and increased the coefficient of variation. Weak interfacial bonds result in the initiation and largescale extension of debonding at fiber breaks, and strong bonds not only cause matrix cracking, but also enhance the stress concentration around the fiber break points. On the other hand, it was clarified that there is an optimal interfacial shear strength which improves the strength and reliability of the composites. Small-scale debonding due to the optimal shear strength increases the cumulative quantity of fiber break, and play a role in increasing the strength and reliability of fiberr-reinforced composites.
一般社団法人日本機械学会の論文
1997-02-25