On the effects of roughness on the nonlinear dynamics of a bolted joint: a multiscale analysis

Abstract : Accurate prediction of the vibration response of friction joints is of great importance when estimating both the performance and the life of build-up structures. The contact conditions at the joint interface, including local normal load distribution and contact stiffness, play a critical role in the nonlinear dynamic response. These parameters strongly depend on the mating surfaces, where the surface roughness is well known to have a significant impact on the contact conditions in the static case. In contrast, its effects on the global and local nonlinear dynamic response of a build-up structure is not as well understood due to the complexity of the involved mechanisms. To obtain a better understanding of the dependence of the nonlinear dynamic response on surface roughness, a newly proposed multiscale approach has been developed. It links the surface roughness to the contact pressure and contact stiffness, and in combination with a multiharmonic balance solver, allows to compute the nonlinear dynamic response for different interface roughness. An application of the technique to a single bolted lap joint highlighted a strong impact of larger roughness values on the pressure distribution and local contact stiffness and in turn on the nonlinear dynamic response.
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European Journal of Mechanics - A/Solids, Elsevier, 2018, 70, pp.44 - 57. 〈10.1016/j.euromechsol.2018.01.005〉
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Soumis le : lundi 12 mars 2018 - 20:23:56
Dernière modification le : mercredi 21 mars 2018 - 18:57:07

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J. Armand, L. Salles, C.W. Schwingshackl, D. Süß, K. Willner. On the effects of roughness on the nonlinear dynamics of a bolted joint: a multiscale analysis. European Journal of Mechanics - A/Solids, Elsevier, 2018, 70, pp.44 - 57. 〈10.1016/j.euromechsol.2018.01.005〉. 〈hal-01730023〉

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