Monitoring of mechanical behaviors of composite shear fastener joint (2nd report, experimental study)

Yutaka Sato, Takao Utsunomiya, Takeshi Takatoya, Ippei Susuki

Research output: Contribution to journalArticle

Abstract

In a structural material of the aircraft, the proportion of composite materials keeps rising more and more because of their excellent properties on specific strength and rigidity. The part where a metallic material is connected to the composite material increases by such circumstances, and how a structural integrity in such a place is secured becomes an important problem. In previous paper, a principle of a method to monitor the mechanical behaviors using axial strain in fastener bolt was proposed. Here, we actually made the fastener with an optical fiber sensor embedded in the shank of a titanium bolt, and applied it to the composite/titanium mechanical shear joint specimens to prove the function of it through the tensile tests. The results are summarized as follows ; (1) proposed monitoring method is well available to monitor the load transfer mode around the fastener hole, (2) we can evaluate both the bearing loads acting to the shank of fastener bolt and the interfacial frictional loads between both materials by this method.

Original languageEnglish
Pages (from-to)1236-1243
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume73
Issue number11
Publication statusPublished - 2007 Nov 1
Externally publishedYes

Keywords

  • Aircraft structure
  • Bearing strength
  • Composite material
  • Fixing
  • Mechanical bolted joint
  • Optical fiber sensor
  • Stress-strain measurement

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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