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Theses

Etude du dévissage spontané d'un assemblage boulonné soumis à des sollicitations transverses dynamiques

Abstract : This thesis focuses on the study of the self-loosening of bolted joints under transverse dynamic loads. Experimental and numerical work was carried out in order to reveal this phenomenon under conditions close to those of actual assemblies. An experiment allowed the loosening of a bolt to be caused by subjecting the assembly to transverse vibration with respect to the axis of the screw. Effects of preload, surface treatment and disposal of the screws were explored. These results were compared with those obtained by a detailed numerical model using the finite element method. However, due to the complexity of the geometry and modeling challenges at the local level, the computation time was very long and may be prohibitive for an industrial study. To remedy this problem, two simplified models were developed, one with a finite element approach associated with a kinematic connector, and one by unidimensional modeling. These simplified models correctly reproduce the self-loosening phenomenon and confirm their efficiency in terms of computation time.
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https://tel.archives-ouvertes.fr/tel-02083637
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Submitted on : Friday, March 29, 2019 - 10:35:29 AM
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  • HAL Id : tel-02083637, version 1

Citation

Olfa Ksentini. Etude du dévissage spontané d'un assemblage boulonné soumis à des sollicitations transverses dynamiques. Mécanique des matériaux [physics.class-ph]. INSA de Toulouse; Ecole d'ingénieurs de Sfax - Tunisie, 2016. Français. ⟨NNT : 2016ISAT0036⟩. ⟨tel-02083637⟩

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