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

J. Armand, L. Salles, C. W. Schwingshackl, D. Süß, K. Willner

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)44-57
Number of pages14
JournalEuropean Journal of Mechanics, A/Solids
Volume70
DOIs
Publication statusPublished - Jul 2018
Externally publishedYes

Keywords

  • Bolted joint
  • Elastic rough contact
  • Nonlinear dynamics

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