ANALYSIS OF FIBER FRICTIONAL SLIDING IN FIBER BUNDLE PUSHOUT TEST

A simple theoretical model is developed to analyze the fiber frictiona l sliding resistance in a fiber bundle pushout test. The effect of the radial constraint imposed by the neighboring fibers on the stress tra nsfer and frictional pushout stress is included in this analysis. Comp arisons of theoretical results of this study and those of two existing fiber pushout models (i.e., single-fiber pushout and three-cylinder) are also presented. For SiC-RBSN and SiC-glass composites with short e mbedded fiber lengths less than 1 mm; there is little difference betwe en all these models. However, for larger embedded fiber lengths, the p resent model gives the highest frictional pushout stress caused by the more realistic radial constraint condition used in the analysis.