Effects of contact between rough surfaces on the dynamic responses of bolted composite joints: Multiscale modeling and numerical simulation

Zhen Zhang, Yi Xiao, Yuanhong Xie, Zhongqing Su

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

A multiscale numerical model, considering both microscopic interfacial properties and macroscopic composite properties, has been developed to model the dynamic responses of bolted composite structures using the elastic-viscoelastic correspondence principle. The complex contact moduli of the uneven interfaces of the joints, featuring multi-asperity contact at the micro perspective, were derived using the fractal contact theory. The frequency-dependent complex moduli of composite materials were ascertained through modal impact tests on unidirectional composites. The damping and stiffness of the composite specimens were solved within ABAQUS software using the complex eigenvalue method. The damping ratios of the joints decreased by over 8.5% while the resonant frequencies increased by more than 0.59% when the bolts of the joints were adjusted from fully loose to fully tightened. Results from the numerical prediction and the experiment were found to be in good agreement, whereby the influence of the interfacial contact conditions on the dynamic responses of the bolted composite structures was revealed through the multiscale analysis.

Original languageEnglish
Pages (from-to)13-23
Number of pages11
JournalComposite Structures
Volume211
DOIs
Publication statusPublished - 1 Mar 2019

Keywords

  • Bolted joint
  • Composite structures
  • Damping ratio
  • Fractal analysis
  • Rough interface

ASJC Scopus subject areas

  • Ceramics and Composites
  • Civil and Structural Engineering

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