Compression properties of square braided fabric - Concave compression properties

Abstract

Concave compression properties of square braided fabric were investigated. From the observation of the cross section with optical microscopy, the mechanism of deformation under concave compressive loading was clarified. The deformation involved change in crimp ratio and braiding angle of fiber bundle. Inside structure of braided fabric and deformation properties were extremely changed at first compression and then tended to converge to stable structure; compression ratio decreased and recovery ratio increased. The change in structure of braided fabric was resulted from change in braiding angle and change in crimp of fiber bundle because of bending deformation.