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Angle-ply laminates with partial-depth notches for damage tolerant design of composite pressure vessels

conference contribution
posted on 2017-01-01, 00:00 authored by C P Fowler, Mathew JoostenMathew Joosten, A C Orifici, C H Wang
© 2017 International Committee on Composite Materials. All rights reserved. The research presented in this paper focuses on the understanding and prediction of the failure mechanisms of angle-ply ([±α]4s) carbon fibre composite laminates with part-depth longitudinal notches, which is a key test configuration for demonstrating compliance with composite flaw tolerance requirements according to ISO 11439. Experimental investigations are carried out to characterise the deformation and failure of centre-notched carbon fibre composite specimens with [±α]4s lay-ups, where α = 35°, 45°, 55°. The influence of notch depth and fibre angle on the tensile strength and failure mechanisms is analysed with the aid of both digital image correlation and X-ray computed tomography. Significant differences in damage onset and development are observed between full-depth and partial-depth notches leading to different strain-to-failure and strength knockdown. Development of delamination at the interface between notched and un-notched sub-laminates is observed to be a critical mechanism in part-depth damage development. This work provides new insight into the effect of part-depth notch on the load carrying capacity of filament wound vessels thus providing new insight into the damage tolerant design of composite pressure vessels.

History

Volume

2017-August

Publisher

Chinese Society for Composite Materials

Location

Xi'an, China

Start date

2017-08-20

End date

2017-08-25

Publication classification

X Not reportable; EN Other conference paper

Title of proceedings

ICCM International Conferences on Composite Materials

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