Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact

In this study a core crush criterion is proposed to determine the residual strength of impacted sandwich structures. The core of the sandwich is made of a Nomex Honeycomb core and the faces are laminated and remain thin. The mechanism of failure of this kind of structure under post-impact compressi...

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Main Authors:	Castanie, Bruno, Aminanda, Yulfian, bouvet, christophe, barrau, jean-jacques
Format:	Article
Language:	English
Published:	Elsevier 2008
Subjects:	TA349 Mechanics of engineering. Applied mechanics TA401 Materials of engineering and construction
Online Access:	http://irep.iium.edu.my/6281/ http://irep.iium.edu.my/6281/ http://irep.iium.edu.my/6281/1/ICS_paper.pdf

id	iium-6281
recordtype	eprints
spelling	iium-62812012-02-18T07:47:15Z http://irep.iium.edu.my/6281/ Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact Castanie, Bruno Aminanda, Yulfian bouvet, christophe barrau, jean-jacques TA349 Mechanics of engineering. Applied mechanics TA401 Materials of engineering and construction In this study a core crush criterion is proposed to determine the residual strength of impacted sandwich structures. The core of the sandwich is made of a Nomex Honeycomb core and the faces are laminated and remain thin. The mechanism of failure of this kind of structure under post-impact compressive loading is due to interaction between three mechanical behaviors: geometrical nonlinearity due to the skin’s neutral line off-set in the dent area, nonlinear response of the core and damages to the skins. For the type of sandwich analysed in this study, initially the core crushes at the apex of the damage. Using a finite element discrete modelling of the core previously proposed by the authors, the load corresponding to the crushing of the first cell can be computed and it gives the value of the residual strength for our criterion. Some geometric and material hypotheses are assumed in the damaged area mainly based on nondestructive inspection (NDI). The criterion is then applied to tests modelled by Lacy and Hwang [Lacy TE, Hwang Y. Numerical modelling of impact-damaged sandwich composites subjected to compression after impact loading. Compos Struct 2003;61:115–128]. It is shown that the criterion allows a good prediction of the tests except in the case of very small dents. Several sensitivity studies on the assumptions were made and it is shown that using this approach, the criterion is robust. Elsevier 2008 Article PeerReviewed application/pdf en http://irep.iium.edu.my/6281/1/ICS_paper.pdf Castanie, Bruno and Aminanda, Yulfian and bouvet, christophe and barrau, jean-jacques (2008) Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact. Composite Structures, 32 (3). pp. 1-8. ISSN S0263-8223(08)00086-X http://www.elsevier.com/locate/compstruct
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TA349 Mechanics of engineering. Applied mechanics TA401 Materials of engineering and construction
spellingShingle	TA349 Mechanics of engineering. Applied mechanics TA401 Materials of engineering and construction Castanie, Bruno Aminanda, Yulfian bouvet, christophe barrau, jean-jacques Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
description	In this study a core crush criterion is proposed to determine the residual strength of impacted sandwich structures. The core of the sandwich is made of a Nomex Honeycomb core and the faces are laminated and remain thin. The mechanism of failure of this kind of structure under post-impact compressive loading is due to interaction between three mechanical behaviors: geometrical nonlinearity due to the skin’s neutral line off-set in the dent area, nonlinear response of the core and damages to the skins. For the type of sandwich analysed in this study, initially the core crushes at the apex of the damage. Using a finite element discrete modelling of the core previously proposed by the authors, the load corresponding to the crushing of the first cell can be computed and it gives the value of the residual strength for our criterion. Some geometric and material hypotheses are assumed in the damaged area mainly based on nondestructive inspection (NDI). The criterion is then applied to tests modelled by Lacy and Hwang [Lacy TE, Hwang Y. Numerical modelling of impact-damaged sandwich composites subjected to compression after impact loading. Compos Struct 2003;61:115–128]. It is shown that the criterion allows a good prediction of the tests except in the case of very small dents. Several sensitivity studies on the assumptions were made and it is shown that using this approach, the criterion is robust.
format	Article
author	Castanie, Bruno Aminanda, Yulfian bouvet, christophe barrau, jean-jacques
author_facet	Castanie, Bruno Aminanda, Yulfian bouvet, christophe barrau, jean-jacques
author_sort	Castanie, Bruno
title	Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
title_short	Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
title_full	Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
title_fullStr	Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
title_full_unstemmed	Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
title_sort	core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact
publisher	Elsevier
publishDate	2008
url	http://irep.iium.edu.my/6281/ http://irep.iium.edu.my/6281/ http://irep.iium.edu.my/6281/1/ICS_paper.pdf
first_indexed	2023-09-18T20:15:10Z
last_indexed	2023-09-18T20:15:10Z
_version_	1777407738949664768

Core crush criterion to determine the strength of sandwich composite structures subjected to compression after impact

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