A failure model for the analysis of cross-ply Non-Crimp Fabric (NCF) composites under in-plane loading: Experimental and numerical study
File(s)
Published version
Author(s)
Gouskos, D
Iannucci, L
Type
Journal Article
Abstract
In the present work, a set of physically-based failure criteria are applied to a cross-ply Non-Crimp Fabric (NCF) composite. The proposed criteria account for the stitch reinforcement and the induced in- and out-of-plane fibre misalignment. A distinction between matrix and fibre failures in tension and compression is introduced, while the in-plane shear non-linear response is directly incorporated to the model as well. The constitutive model is associated with an energy-based damage mechanics method, which consists of five in-plane damage variables per layer level. Within this study, a novel approach to obtain the effective longitudinal stiffness of the composite, as a function of the in- and out-of-plane misalignment, is described. An experimental study characterises the internal structure and the mechanical response of the composite in tension, compression, in-plane shear and Mode I & II interlaminar fractures. In this paper, validation examples for the failure criteria, implemented in Abaqus/Explicit as a VUMAT subroutine, are presented. Tensile, in-plane shear and compressive responses are modelled at a coupon level with continuum shell elements and correlate well with the experimental data. Fibre misalignment, mainly out-of-plane, had a strong influence on the compressive modulus and strength of the composite.
Date Issued
2022-08
Date Acceptance
2022-05-25
Citation
Engineering Fracture Mechanics, 2022, 271, pp.108575-108575
ISSN
0013-7944
Publisher
Elsevier BV
Start Page
108575
End Page
108575
Journal / Book Title
Engineering Fracture Mechanics
Volume
271
Copyright Statement
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/)
(http://creativecommons.org/licenses/by/4.0/)
License URL
Identifier
https://www.sciencedirect.com/journal/engineering-fracture-mechanics
Subjects
Mechanical Engineering & Transports
Publication Status
Published
Coverage Spatial
United Kingdom
Article Number
108575
Date Publish Online
2022-06-02