Modelling of impact on sandwich structure for fast maintenance loops

In the aeronautical field, sandwich structures are widely used for secondary structures like flaps or landing gear doors. The modeling of low velocity/low energy impact, which can lead to a decrease of the structure strength by 50%, remains a designer’s main problem. Since this type of impact has th...

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Main Authors:	Castanie, Bruno, Aminanda, Yulfian, Schwob, Cyrille
Format:	Conference or Workshop Item
Language:	English
Published:	2012
Subjects:	TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics
Online Access:	http://irep.iium.edu.my/26648/ http://irep.iium.edu.my/26648/1/Article_ICAS2012.pdf

id	iium-26648
recordtype	eprints
spelling	iium-266482013-01-04T02:45:38Z http://irep.iium.edu.my/26648/ Modelling of impact on sandwich structure for fast maintenance loops Castanie, Bruno Aminanda, Yulfian Schwob, Cyrille TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics In the aeronautical field, sandwich structures are widely used for secondary structures like flaps or landing gear doors. The modeling of low velocity/low energy impact, which can lead to a decrease of the structure strength by 50%, remains a designer’s main problem. Since this type of impact has the same effect as quasi-static indentation, the study first focuses on the behavior of honeycomb cores under compression. A phenomenological analysis was conducted which highlights the postbuckling behavior of the honeycomb structure thus enabling a discrete modeling. This discrete approach accurately predicts the static indentation on honeycomb core alone, the indentation and the residual dent depth on sandwich structure with metal skins supported on rigid flat support. The domain of validity of this approach is investigated. In any case, the spring elements used to model the honeycomb cannot take into account the transverse shear that occurs in the core during the bending of a sandwich. To overcome this strong limitation, a multi-level approach is proposed. Thus, it is possible to predict the dynamic structural response in the case of low-velocity/low-energy impact on metal-skinned sandwich structure in bending. A good correlation with dynamic experimental tests is achieved. This model is then used to simulate the response of this indented structure subjected to lateral compressive loading (known as CAI/ Compression after impact). A good correlation with test results is obtained except for the very small residual print depth. To predict the residual strength of impacted sandwich, a core crush criterion is proposed and validated first with metallic skins and then with composite skins. 2012-09 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/26648/1/Article_ICAS2012.pdf Castanie, Bruno and Aminanda, Yulfian and Schwob, Cyrille (2012) Modelling of impact on sandwich structure for fast maintenance loops. In: ICAS 2012 ( International Conference on Aerospace Science 2012, 23 - 28 September 2012, Brisbane Australia. (In Press)
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics
spellingShingle	TJ Mechanical engineering and machinery TL Motor vehicles. Aeronautics. Astronautics Castanie, Bruno Aminanda, Yulfian Schwob, Cyrille Modelling of impact on sandwich structure for fast maintenance loops
description	In the aeronautical field, sandwich structures are widely used for secondary structures like flaps or landing gear doors. The modeling of low velocity/low energy impact, which can lead to a decrease of the structure strength by 50%, remains a designer’s main problem. Since this type of impact has the same effect as quasi-static indentation, the study first focuses on the behavior of honeycomb cores under compression. A phenomenological analysis was conducted which highlights the postbuckling behavior of the honeycomb structure thus enabling a discrete modeling. This discrete approach accurately predicts the static indentation on honeycomb core alone, the indentation and the residual dent depth on sandwich structure with metal skins supported on rigid flat support. The domain of validity of this approach is investigated. In any case, the spring elements used to model the honeycomb cannot take into account the transverse shear that occurs in the core during the bending of a sandwich. To overcome this strong limitation, a multi-level approach is proposed. Thus, it is possible to predict the dynamic structural response in the case of low-velocity/low-energy impact on metal-skinned sandwich structure in bending. A good correlation with dynamic experimental tests is achieved. This model is then used to simulate the response of this indented structure subjected to lateral compressive loading (known as CAI/ Compression after impact). A good correlation with test results is obtained except for the very small residual print depth. To predict the residual strength of impacted sandwich, a core crush criterion is proposed and validated first with metallic skins and then with composite skins.
format	Conference or Workshop Item
author	Castanie, Bruno Aminanda, Yulfian Schwob, Cyrille
author_facet	Castanie, Bruno Aminanda, Yulfian Schwob, Cyrille
author_sort	Castanie, Bruno
title	Modelling of impact on sandwich structure for fast maintenance loops
title_short	Modelling of impact on sandwich structure for fast maintenance loops
title_full	Modelling of impact on sandwich structure for fast maintenance loops
title_fullStr	Modelling of impact on sandwich structure for fast maintenance loops
title_full_unstemmed	Modelling of impact on sandwich structure for fast maintenance loops
title_sort	modelling of impact on sandwich structure for fast maintenance loops
publishDate	2012
url	http://irep.iium.edu.my/26648/ http://irep.iium.edu.my/26648/1/Article_ICAS2012.pdf
first_indexed	2023-09-18T20:39:39Z
last_indexed	2023-09-18T20:39:39Z
_version_	1777409279556321280

Modelling of impact on sandwich structure for fast maintenance loops

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