APPLICATIONS OF A 2-WAY DEBONDING THEORY TO SHORT FIBER COMPOSITES

Traditional fibre debonding theories which consider debonding only from the loaded end of the fibre are only applicable to composites with low fibre volume fraction, low fibre/matrix moduli ratio and high interfacial strength/interfacial friction ratio. A two-way debonding theory, which is applicable to all general cases, has recently been developed. In this paper, major findings from the new two-way theory are first summarized. The new theory is compared with traditional theories with respect to the prediction of composite properties. For the fibre pull-out test specimen, where fibre volume fraction is very low, a new method of deriving interfacial bond properties based on one-way debonding theory is presented. For practical composite systems, the significance of employing the new two-way debonding theory is discussed. © 1990.