Effect of surface roughness on the adhesive strength of the heat-resistant adhesive RTV88

Tae Min Cho, Yeon Seok Choo, Min Jung Lee, Hyeon Cheol Oh, Byung Chai Lee, Tae Hak Park, Young Sug Shin

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Heat-resistant adhesive RTV88 is a hyper-elastic material and so far there have been little research on using RTV88 in adhesive joints. In this study, the effect of surface roughness on the adhesive strength of RTV88 was examined. Aluminum adherends were first sandblasted in order to generate rough surfaces, and then tensile-shear tests on Al/RTV88 single lap joints were performed. The shear strength was shown to be influenced by surface roughness. Peel failure was dominant when the surface roughness was at a low level. However, cohesive failure was the major type of failure when the surface roughness was at a high level. Effective area, peel failure area, and cohesive failure area were introduced to explain the effects of surface roughness on the adhesive strength. An empirical relation for the failure force was proposed, based on these parameters. Tensile tests of the RTV88 bonding was performed in order to obtain the necessary data. Finally, the empirical relation for the failure force was verified by tensile-shear test results.

Original languageEnglish
Pages (from-to)1875-1882
Number of pages8
JournalJournal of Adhesion Science and Technology
Volume23
Issue number15
DOIs
StatePublished - 1 Sep 2009

Keywords

  • Adhesive joint
  • Adhesive strength
  • Failure force
  • RTV88
  • Surface roughness

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