Effect of sample cutting direction on mechanical properties of woven thermoplastic prepreg

Abstract

Woven textile composites are gaining popularity, judging from the many reports. However, in many instances they are confined to thermoset matrices. In view of many favorable circumstances, thermoplastic-based systems are slowly gaining recognition, which can be easily attributed to their unique properties, viz. better damage tolerance, ease of handling, recyclability, etc. However, reports usually refer to materials derived from fabrics, either preimpregnated or otherwise. Here, a combination of weaving and thermoplastic elements was studied through the utilization of continuous fiber impregnated thermoplastic prepreg (COFIT) to produce a woven system. The effect of sample cutting direction on the prepreg plain weave properties was examined. Correlations between different specimen geometries and weave characteristics were also noted. In general, the specimen cutting directions give rise to various differences in weaving characteristics, which in turn influence the properties obtained.