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| Hermundstad, O; Moan, T; Nordal, H. |
| This paper deals with the structural analysis of transverse frames and bulkheads in sandwich catamarans. Finite element analyses of a frame and a bulkhead have been carried out, and the results are compared to those obtained from a finite element model of the entire craft. The frame and the bulkhead have been analysed with five different boundary conditions. Four idealized load combinations have been applied, and it is demonstrated that transverse frame models can give quite inaccurate results. This is due to the difficulty in deciding the relevant support springs to represent the interaction between the actual frame and the other part of the structure. When designing a new type of vessel, it is recommended to carry out a global finite element analysis... |
| Tipo: Text |
Palavras-chave: Hovercraft; Ship technology; Composite materials; Analyse par éléments finis; Structure sandwich; Catamaran à coussin d'air. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1076.pdf |
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| Darold, L; Blanco, E. |
| One of the major defects that can be found on composite sandwich structures is poor bonding of the core on the exterior skins, particularly with the technique of bonding under vacuum. Therefore, we have looked at all the possible means of detecting these bonding defects, with two objectives: to be able to control integrally a piece of large dimensions, and to be able to control the piece in the course of manufacturing, that is to say after the bonding on the first skin. All of the non-destructive test methods now known have therefore been tested, and in particularly infrared thermography, ultrasonic control, and acoustic methods. This study, carried out in collaboration with the CETIM, the STCAN, Aerospatiale and other laboratories and companies without... |
| Tipo: Text |
Palavras-chave: Adhesion; Ship technology; Composite materials; Contrôle non destructif; Structure sandwich. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1049.pdf |
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