Development and assessment of modelling strategies to predict failure in tow-based discontinuous composites
File(s)
Accepted version
Author(s)
Li, Yizhuo
Pimenta, Soraia
Type
Journal Article
Abstract
Tow-based discontinuous composites (TBDCs) are a growing class of materials that combine manufacturability, light-weight, and high performance. This study proposes multi-scale modelling approaches to predict the tensile strength and failure envelopes of tow-based discontinuous composites, by representing the actual composite (with randomly-oriented tows) as an equivalent ply-by-ply laminate. Several modelling approaches are considered for the different scales, including (i) a stochastic bi-linear shear-lag formulation accounting for the random location of tow-ends and matrix cracking, (ii) a novel failure criterion for a discontinuous uni-directional ply accounting for the interaction between tow pull-out and transverse failure, and (iii) a ply-discount method or a maximum strain energy criterion for the final failure of the composite. The model computes full failure envelopes for ply-by-ply laminates equivalent to TBDCs within minutes, and the results show good agreement with experimental data.
Date Issued
2019-02-01
Date Acceptance
2018-05-28
Citation
Composite Structures, 2019, 209, pp.1005-1021
ISSN
0263-8223
Publisher
Elsevier
Start Page
1005
End Page
1021
Journal / Book Title
Composite Structures
Volume
209
Copyright Statement
© 2018 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Royal Academy of Engineering
Automobili Lamborghini S.p.A.
Identifier
https://www.sciencedirect.com/science/article/pii/S0263822317342514?via%3Dihub
Grant Number
RF/133
IT00591801204
Subjects
Science & Technology
Technology
Mechanics
Materials Science, Composites
Materials Science
Discontinuous reinforcement
Strength
Analytical modelling
Multi-scale material
FIBER ORIENTATION
MECHANICAL-PROPERTIES
TENSILE PROPERTIES
STRENGTH
SIMULATION
LENGTH
DAMAGE
Materials
09 Engineering
Publication Status
Published
Date Publish Online
2018-06-06