Interaction of Z-pins with multiple mode II delaminations in composite laminates

Date published

2016-05-31

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Publisher

Springer

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Article

ISSN

0014-4851

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Citation

M. Yasaee, G. Mohamed and S. R. Hallett. Interaction of Z-pins with multiple mode II delaminations in composite laminates. Experimental Mechanics, October 2016, Volume 56, Issue 8, pp1363–1372

Abstract

The application of Z-pinning is a subject of great interest in the field of through-thickness reinforcement (TTR) of composite laminates. To date, the majority of Z-pin characterisation work has been conducted on fracture coupons containing a single embedded delamination, which is often not representative of real failure of reinforced composite structures in service. In this investigation a test procedure to produce two independent Mode II delaminations was developed to analyse their interaction with a region of Z-pin reinforcement. Initially numerical models were used to optimise the chosen configuration. Experimental results show in detail the response of Z-pins to two independent delaminations. These results highlight the ability of the Z-pins to effectively arrest mode II delaminations at multiple levels through the sample thickness. Additionally they provide a much needed data set for validation and verification of Z-pin numerical modelling tools.

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Software Description

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Github

Keywords

Composite, Through thickness reinforcement, Z-pin, Multiple delaminations, Mode II, CFRP

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Attribution-NonCommercial 4.0 International

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