Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins
In the aircraft industry, manufacturers have to decide quickly whether an impacted sandwich needs repairing or not. Certain computation tools exist at present but they are very time-consuming and they also fail to perfectly model the physical phenomena involved in an impact. In a previous publicatio...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2008
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| Online Access: | http://irep.iium.edu.my/6282/ http://irep.iium.edu.my/6282/1/IJIE_Article_final.pdf |
| _version_ | 1848776640036864000 |
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| author | Castanie, Bruno Bouvet, Christophe Aminanda, Yulfian Barrau, Jean-Jacques Thevenet, Pascal |
| author_facet | Castanie, Bruno Bouvet, Christophe Aminanda, Yulfian Barrau, Jean-Jacques Thevenet, Pascal |
| author_sort | Castanie, Bruno |
| building | IIUM Repository |
| collection | Online Access |
| description | In the aircraft industry, manufacturers have to decide quickly whether an impacted sandwich needs repairing or not. Certain computation tools exist at present but they are very time-consuming and they also fail to perfectly model the physical phenomena involved in an impact. In a previous publication, the authors demonstrated the possibility of representing the NomexTM honeycomb core
by a grid of nonlinear springs and have pointed out both the structural behaviour of the honeycomb and the influence of core-skin boundary conditions. This discrete approach accurately predicts the static indentation on honeycomb core alone and the indentation on sandwich structure with metal skins supported on rigid flat support. In this study, the domain of validity of this approach is investigated.
It is found that the approach is not valid for sharp projectiles on thin skins. 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 in the present article. In this approach, the sandwich structure is modelled by Mindlin plate elements and the computed static contact law is implemented in a nonlinear spring located between the impactor and the structure. Thus, it is possible to predict the dynamic structural response in the case of low-velocity/low-energy impact on metal-skinned sandwich structures. A good correlation with dynamic experimental tests is achieved. |
| first_indexed | 2025-11-14T14:33:18Z |
| format | Article |
| id | iium-6282 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T14:33:18Z |
| publishDate | 2008 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-62822012-01-10T11:14:55Z http://irep.iium.edu.my/6282/ Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins Castanie, Bruno Bouvet, Christophe Aminanda, Yulfian Barrau, Jean-Jacques Thevenet, Pascal TJ Mechanical engineering and machinery In the aircraft industry, manufacturers have to decide quickly whether an impacted sandwich needs repairing or not. Certain computation tools exist at present but they are very time-consuming and they also fail to perfectly model the physical phenomena involved in an impact. In a previous publication, the authors demonstrated the possibility of representing the NomexTM honeycomb core by a grid of nonlinear springs and have pointed out both the structural behaviour of the honeycomb and the influence of core-skin boundary conditions. This discrete approach accurately predicts the static indentation on honeycomb core alone and the indentation on sandwich structure with metal skins supported on rigid flat support. In this study, the domain of validity of this approach is investigated. It is found that the approach is not valid for sharp projectiles on thin skins. 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 in the present article. In this approach, the sandwich structure is modelled by Mindlin plate elements and the computed static contact law is implemented in a nonlinear spring located between the impactor and the structure. Thus, it is possible to predict the dynamic structural response in the case of low-velocity/low-energy impact on metal-skinned sandwich structures. A good correlation with dynamic experimental tests is achieved. Elsevier 2008-07 Article PeerReviewed application/pdf en http://irep.iium.edu.my/6282/1/IJIE_Article_final.pdf Castanie, Bruno and Bouvet, Christophe and Aminanda, Yulfian and Barrau, Jean-Jacques and Thevenet, Pascal (2008) Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins. International Journal of Impact Engineering, 35 (7). pp. 620-634. ISSN 0734-743X http://www.elsevier.com/locate/ijimpeng |
| spellingShingle | TJ Mechanical engineering and machinery Castanie, Bruno Bouvet, Christophe Aminanda, Yulfian Barrau, Jean-Jacques Thevenet, Pascal Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins |
| title | Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins |
| title_full | Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins |
| title_fullStr | Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins |
| title_full_unstemmed | Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins |
| title_short | Modelling of low-energy/low-velocity impact on Nomex honeycomb sandwich structures with metallic skins |
| title_sort | modelling of low-energy/low-velocity impact on nomex honeycomb sandwich structures with metallic skins |
| topic | TJ Mechanical engineering and machinery |
| url | http://irep.iium.edu.my/6282/ http://irep.iium.edu.my/6282/ http://irep.iium.edu.my/6282/1/IJIE_Article_final.pdf |