301 一方向複合材料のクリープ寿命予測 : 隣接破断繊維による応力集中と界面はく離進展の影響

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This paper describes creep rupture model taking into account the stress concentration on adjacent fibers and the propagation of interfacial debonding (PID) around broken fibers in unidirectional composites. The stress concentration makes an adjacent fiber break, and leads to clusters which are correlated breaks in the nearest intact fibers within the same cross section. The interfacial debonding is accompanied with the fiber break under the tensile load, and it grows in creep. We simulated the creep rupture time using 3D shear-lag model taking into account the stress concentration. We performed a fragmentation test by the use of VE resin embedded a single ECR-glass fiber to investigate the PID behavior. And we proposed the creep rupture model taking into account the PID. For result, a creep rupture time does not depend on the PID, because in this study the PID is very small on ECR-glass/VE.
一般社団法人日本機械学会の論文
2003-10-17