Servicio de Información Comunitario sobre Investigación y Desarrollo - CORDIS

Modeling capabilities on durability behaviour

This benchmark study is to evaluate the capabilities of different modelling approaches (analytical, finite elements) used by the partners to predict the strength of a joint of simple geometry (a single lap joint). Modelling was undertaken by the University of Southampton and by CETENA. Independently, CTA conducted test samples to check the validity of the modelling.

The key elements to keep in mind from this study are: the overall philosophy of dimensioning with rigid adhesives should be to design against yielding (required input data from the adhesive behaviour law can be restricted to the linear part), the non linear effects coming from the geometry of the joint must taken in account, with rigid adhesives systems, the yielding of the adherent is important (the adhesive is not always the weakest point in the assembly), adhesive materials are sensitive to pressure.

The plasticity criterion (Raghava) must take into account the yield stress in tension and in compression, for a simple geometry joint, both analytical and finite element calculations have given equivalent results.

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Delegation Generale pour l'Armement
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