Fibre fragment distribution in a single-fibre composite tension test

✍ Scribed by J Andersons; R Joffe; M Hojo; S Ochiai

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 180 KB
• Volume: 32
• Category: Article
• ISSN: 1359-8368
• DOI: 10.1016/s1359-8368(01)00003-8

✦ Synopsis

Single ®bre fragmentation tests are performed for brittle ®bres with Weibull strength distribution and different surface treatments. The fragmentation process is modelled and closed-form expressions for break spacing distribution are obtained. The model accounts for the effect of ®nite ®bre length on the initial fragmentation as well as for break interaction on the advanced fragmentation stage. It is assumed that the exclusion zone due to ®bre±matrix interface failure and stress recovery in the ®bre is linearly dependent on the applied load. This assumption is validated experimentally. The derived theoretical average fragment length dependence on applied load is used to determine the ®bre strength distribution parameters and the effective interfacial shear stress for carbon/epoxy single ®bre composites with different ®bre surface treatment and for glass/vinylester single ®bre composite. Fragment length distribution is predicted for several load levels. Predictions are in good agreement with experimental data.