Paper number 628

EVALUATING THE MECHANICAL PROPERTIES OF GLASS FIBER/EPOXY INTERFACES USING THE SLICE COMPRESSION TEST

Hiroyuki KAWADA¹, Norihiko TANIGUCHI², and Kun-Nan Tsay³

1Department of Mechanical Engineering, Waseda University,
3-4-1 Okubo, Shinjuku, Tokyo, Japan
2, 3Graduate school of Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo, Japan

Summary

Properties of the fiber/matrix interface in SiO2/epoxy and SiC/epoxy composites are investigated using the slice compression test (SCT) for the single fiber, where the specimen is loaded and unloaded between two different plates. It is found that the interfacial debonding proceeds from the polished surface at a soft plate side and that the fiber protrusion occurs after unloading. Interfacial shear-sliding stress is obtained based on the constant shear-sliding stress analysis which employing the obtained protrusion length. It is demonstrated that the experimental value is in a good agreement with that from the other technique on the same system. However, it is pointed out analytically that the applied stress to the specimen has a limitation due to Poisson's effect when calculating the interfacial shear-sliding stress.

Keywords

slice compression test, polymer matrix composite, interface, interfacial shear sliding stress, poison's effect, debonding.