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Effects of layer shift and yarn path variability on mechanical properties of a twill weave composite

Matveev, Mikhail Y.; Long, Andrew C.; Brown, Louise P.; Jones, I. Arthur


Mikhail Y. Matveev

Andrew C. Long

Louise P. Brown

I. Arthur Jones


Experimental and numerical analysis of a woven composite were performed in order to assess the effect of yarn path and layer shift variability on properties of the composite. Analysis of the geometry of a 12K carbon fibre 2×2 twill weave at the meso- and macro-scales showed the prevalence of the yarn path variations at the macro-scale over the meso-scale variations. Numerical analysis of yarn path variability showed that it is responsible for a Young’s modulus reduction of 0.5% and CoV of 1% which makes this type of variability in the selected reinforcement almost insignificant for an elastic analysis. Finite element analysis of damage propagation in laminates with layer shift showed good agreement with the experiments. Both numerical analysis and experiments showed that layer shift has a strong effect on the shape of the stress-strain curve. In particular, laminates with no layer shift tend to exhibit a kink in the stress-strain curve which was attributed solely to the layer configuration.

Journal Article Type Article
Journal Journal of Composite Materials
Print ISSN 0021-9983
Electronic ISSN 0021-9983
Publisher SAGE Publications (UK and US)
Peer Reviewed Peer Reviewed
Keywords Textile composites; numerical modelling; mechanical properties; variability
Publisher URL
Copyright Statement Copyright information regarding this work can be found at the following address:


Journal of Composite Materials-2016-Matveev-0021998316655870.pdf (974 Kb)

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