| Titre : |
Adhesive joints : Analyzing computation and design using the finite element method |
| Type de document : |
texte imprimé |
| Auteurs : |
T. Welters, Auteur ; Klaus Dilger, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 42-46 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésifs -- Propriétés mécaniques
Assemblages collés -- Propriétés mécaniques
Eléments finis, Méthode des
Polyuréthanes
|
| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
This article is based on the results of a public sponsored research project with the goal to develop simulation strategies for different kinds of bond problems. This includes the meshing task and the description of the material behavior.
One group of bond problems investigated in this project was elastic bonds. In many industrial sectors, like rail vehicle building and automotive engineering, such bonds are used for semi-structural applications. The design of these joints is difficult due to, in comparison to linear elastic approaches, complicated material behavior. Typical members of the group of elastic adhesives are polyurethanes. Low modulus polyurethane adhesives often show a rubber-like material behavior; the typical rubber incompressibility may be observed.
Descriptions for such materials are often based on the Mooney-Rivlin law, which, in the case of a double curvature stress strain curve, characterizes hyper-elastic materials by five constants.
The determination of the required characteristics is experimentally costly; uniaxial and equibiaxial tension tests and shear tests have to be carried out.
Therefore, the attempt was made to use a model, based on the underlying polymer physics. The Arruda-Boyce model for rubber elasticity is such a model and possesses three free parameters.
Relatively simple tube specimens were examined under tension and torsion loads to determine the required values for a common industrial polyurethane adhesive. The resulting material description has been verified with different complex test specimens under inhomogeneous stress states. The meshing and modeling knowledge obtained will be merged into a model library, which allows adequate bond simulations without special polymer knowledge. |
| Note de contenu : |
- Mechanical behavior
- FEM requirements
- Catalogue of joint geometries
- Submodeling
- Current work |
| En ligne : |
https://drive.google.com/file/d/1dwbB7JBEg1Xm7HsCt4UG3N0zHxKpkjIC/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20027 |
in ADHESIVES AGE > Vol. 45, N° 9 (09/2002) . - p. 42-46
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