Stress Corrosion Cracking of Notched GFRP Laminates. Microscopic Fracture Model and Crack Propagation Rate.

Kawada, Hiroyuki; Okada, Akiyoshi; Ueno, Hironori; Hayashi, Ikuhiko

doi:10.1299/kikaia.61.2566

Cited by 2 publications

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“…However, fibers in the matrix are corroded in such environments. Studies on SCC of PMCs in our laboratory have revealed that the SCC of the PMCs was also promoted under the water environment, although the fibers were not obviously corroded by water (5) . According to fracture mechanics, fiber bridging enhances the toughness of a composite.…”

Section: Introductionmentioning

confidence: 90%

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Effect of Water Absorption on Interaction between Matrix Cracking and Fiber Bridging for Stress Corrosion Cracking of PMC

Kobiki

Kawada

2005

JSME Int. J., Ser. A

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The effect of water on fiber bridging of polymer matrix composites (PMCs) has been studied for stress-corrosion cracking (SCC). The fiber bridging during crack propagation in the PMC was observed directly using a transparent polymer matrix. Specimens were immersed and weighed just before conducting the crack propagation test. The contribution of mechanical degradation caused by the water to the bridging was measured as a function of weight gain due to water absorption. The critical energy release rate of the matrix decreased with increase of the water absorption. The energy release rate of a bridged crack varied with the water absorption. To investigate the variation in the bridging mechanism under the water environment, we calculated the bridging stress the σ t and the bridging contribution to crack propagation resistance ∆G based on a single-fiber bridging mechanism with the interfacial debonding length and the interfacial debonding energy. The debonding length was measured directly, and the debonding energy was obtained in a fragmentation test. The calculation showed that the increase in the interfacial debonding length influenced the fiber bridging mechanism.

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Section: Introductionmentioning

confidence: 90%

“…Generally, PMCs used in corrosive environments are reinforced by glass fibers (1) - (5) . However, fibers in the matrix are corroded in such environments.…”

Section: Introductionmentioning

confidence: 99%