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

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...

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Main Authors:	Sitnikova, Elena, Li, Shuguang, Li, Dafei, Yi, Xiaosu
Format:	Article
Language:	English English
Published:	Elsevier 2017
Online Access:	http://eprints.nottingham.ac.uk/43769/ http://eprints.nottingham.ac.uk/43769/ http://eprints.nottingham.ac.uk/43769/ http://eprints.nottingham.ac.uk/43769/1/delamination_subtleties_Sitnikova_et_al_ACCEPTED.pdf http://eprints.nottingham.ac.uk/43769/8/1-s2.0-S0266353817305699-main.pdf

id	nottingham-43769
recordtype	eprints
spelling	nottingham-437692018-07-02T09:13:39Z http://eprints.nottingham.ac.uk/43769/ Subtle features of delamination in cross-ply laminates due to low speed impact Sitnikova, Elena Li, Shuguang Li, Dafei Yi, Xiaosu 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. Elsevier 2017-09-08 Article PeerReviewed application/pdf en cc_by_nc_nd http://eprints.nottingham.ac.uk/43769/1/delamination_subtleties_Sitnikova_et_al_ACCEPTED.pdf application/pdf en cc_by http://eprints.nottingham.ac.uk/43769/8/1-s2.0-S0266353817305699-main.pdf Sitnikova, Elena and Li, Shuguang and Li, Dafei and Yi, Xiaosu (2017) Subtle features of delamination in cross-ply laminates due to low speed impact. Composites Science and Technology, 149 . pp. 149-158. ISSN 0266-3538 http://www.sciencedirect.com/science/article/pii/S0266353817305699 doi:10.1016/j.compscitech.2017.06.021 doi:10.1016/j.compscitech.2017.06.021
repository_type	Digital Repository
institution_category	Local University
institution	University of Nottingham Malaysia Campus
building	Nottingham Research Data Repository
collection	Online Access
language	English English
description	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.
format	Article
author	Sitnikova, Elena Li, Shuguang Li, Dafei Yi, Xiaosu
spellingShingle	Sitnikova, Elena Li, Shuguang Li, Dafei Yi, Xiaosu Subtle features of delamination in cross-ply laminates due to low speed impact
author_facet	Sitnikova, Elena Li, Shuguang Li, Dafei Yi, Xiaosu
author_sort	Sitnikova, Elena
title	Subtle features of delamination in cross-ply laminates due to low speed impact
title_short	Subtle features of delamination in cross-ply laminates due to low speed impact
title_full	Subtle features of delamination in cross-ply laminates due to low speed impact
title_fullStr	Subtle features of delamination in cross-ply laminates due to low speed impact
title_full_unstemmed	Subtle features of delamination in cross-ply laminates due to low speed impact
title_sort	subtle features of delamination in cross-ply laminates due to low speed impact
publisher	Elsevier
publishDate	2017
url	http://eprints.nottingham.ac.uk/43769/ http://eprints.nottingham.ac.uk/43769/ http://eprints.nottingham.ac.uk/43769/ http://eprints.nottingham.ac.uk/43769/1/delamination_subtleties_Sitnikova_et_al_ACCEPTED.pdf http://eprints.nottingham.ac.uk/43769/8/1-s2.0-S0266353817305699-main.pdf
first_indexed	2018-09-06T13:28:45Z
last_indexed	2018-09-06T13:28:45Z
_version_	1610864945612718080

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

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