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Subtle features of delamination in cross-ply laminates due to low speed impact

Sitnikova, Elena; Li, Shuguang; Li, Dafei; Yi, Xiaosu

Authors

SHUGUANG LI shuguang.li@nottingham.ac.uk
Professor of Aerospace Composites

Dafei Li

Xiaosu Yi



Abstract

In cross-ply laminates, the shape of delamination areas, which form due to low velocity impact, have two subtle features, which have been observed consistently in numerous experiments. Those are the pointed delamination tips and the intact zone between the lobes of delamination. However, there have not been any account available in the literature how they can be consistently captured through numerical modelling, and hence these features in published modelling results were often absent. It is the objective of this paper to identify the underlying modelling considerations so that these features can be captured with confidence. A key and unique reason has been identified in each case. Namely, inclusion of intra-laminar damage allows to reproduce the pointed delamination tips, while the gap between the lobes of delamination can be captured by models with sufficiently refined mesh, where friction between the laminas is taken into account. The capability of capturing these subtle features helps to raise the level of fidelity on the simulation of delamination due to impact.

Citation

Sitnikova, E., Li, S., Li, D., & Yi, X. (2017). Subtle features of delamination in cross-ply laminates due to low speed impact. Composites Science and Technology, 149, 149-158. https://doi.org/10.1016/j.compscitech.2017.06.021

Journal Article Type Article
Acceptance Date Jun 20, 2017
Online Publication Date Jun 21, 2017
Publication Date Sep 8, 2017
Deposit Date Jun 26, 2017
Publicly Available Date Jun 26, 2017
Journal Composites Science and Technology
Print ISSN 0266-3538
Electronic ISSN 0266-3538
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 149
Pages 149-158
DOI https://doi.org/10.1016/j.compscitech.2017.06.021
Keywords Laminate; Delamination; Matrix cracking; Damage mechanics;
Friction
Public URL http://eprints.nottingham.ac.uk/id/eprint/43769
Publisher URL http://www.sciencedirect.com/science/article/pii/S0266353817305699
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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