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Theses

Caractérisation mécanique et outil d'aide au dimensionnement des collages structuraux

Abstract : In recent years, structural adhesive bonding has become a popular joining method for the transportation industry. Its development is nevertheless hindered by several limitations and by design rules that are still somewhat empirical. Even today, characterisation methods and finite element tools are not always appropriate for industrial applications. This thesis work consisted in developing an experimental and numerical approach to bring help in the design of structural adhesive bonds. For the mechanical characterisation of the adhesive within structural assemblies, a modified experimental M. ARCAN set up is used. This set up allows varying the loading direction while preserving a relatively uniform state of stress inside the joint. On the basis of experimental observations, a non-linear phenomenological material model based on a generalized Drucker-Prager criterion is proposed. A specific focus on the microstructure morphology brings some information concerning damage mechanisms. To overcome industrial calculation constraints (mesh refinement, CPU time, etc.), an efficient computer tool has also been developed. It is based on the p-version finite element method which allows keeping « industrial » mesh with a reasonable description of adhesive joints. This computer tool has shown to be reliable and successful to detect edge effects on coarse meshes. This work is a first step to facilitate predicting the fracture of structural adhesive joints.
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Submitted on : Tuesday, June 17, 2008 - 2:04:13 PM
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  • HAL Id : tel-00288527, version 1

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Sébastien Joannès. Caractérisation mécanique et outil d'aide au dimensionnement des collages structuraux. Mécanique [physics.med-ph]. École Nationale Supérieure des Mines de Paris, 2007. Français. ⟨NNT : 2007ENMP1528⟩. ⟨tel-00288527⟩

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