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Modeling and Simulation of the Defect Form Effect on Mechanical Behaviour of Shrink-Fit Assemblies.

Auteurs : Hamid Boutoutaou, Jean-François Fontaine
Année : 2016
Domaine : Sciences des matériaux
Type : Communication
Conférence: 7th African Conference on Non Destructive Testing ACNDT 2016 & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : shrink-fit, finite element, modeling of contact, machining, behavior

Résumé :

The calculation methods of shrink fit assemblies remain traditional and have hardly changed for several years. They consider that the contact surfaces are perfectly smooth and do not take into account their geometrical defects (shape,roughness ....). The models created impose too high manufacturing costs to make consistent assumptions of calculations with the operational conditions of realization. To reduce manufacturing costs, the study of the influence of defect form on assemblies resistance characteristics is essential. The objective of this work is to study the influence of the defect form on the strength characteristics of shrink fit assemblies. It is shown that the defect form is not prejudicial to the strength of the assembly: the mean pressures are almost equivalent to the conventional case of surfaces without defects. Various finite element simulations were performed. The influence of the amplitude and of the default period was studied for different types of tightening.