Pseudo-ductility by fragmentation of central unidirectional plies in thin CFRP angle-ply laminates: 16th European Conference on Composite Materials, ECCM 2014

Fuller, J. D., Jalalvand, M. and Wisnom, M. R. (2014) Pseudo-ductility by fragmentation of central unidirectional plies in thin CFRP angle-ply laminates: 16th European Conference on Composite Materials, ECCM 2014. In Proceedings 16th European Conference on Composite Materials, ECCM 2014: 16th European Conference on Composite Materials, ECCM 2014; Seville; Spain; 22 June 2014 through 26 June 2014; Code 109290. European Conference on Composite Materials..

Record type: Conference or Workshop Item (Paper)

Abstract

Pseudo-ductile metal-like tensile stress-strain responses with 700 MPa "yield stress" plateau and 4.0% failure strain have been achieved experimentally using thin-ply carbon epoxy prepreg and [+26n/0]S (n = 8 and 10) layups. Analysis of tested specimens has been conducted using microscopy and ultrasonic C-scan. These show that periodic fibre breakages in the 0° plies lead to local delaminations that propagate along the 0°/ - 26° interfaces. This gradual failure process of fragmentation and dispersed local delamination allows the demonstrated pseudo-ductile strains.

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