R-curve behavior of adhesively bonded composite joints with highly toughened epoxy adhesive under mixed mode conditions

Yousuke Kouno, Makoto Imanaka, Ryutaro Hino, Masaki Omiya, Fusahito Yoshida

研究成果: Article査読

抄録

The fracture toughness of an adhesively bonded carbon fiber reinforced plastic joint under mixed mode (I and II) conditions was determined by means of the Fernlund–Spelt type double cantilever beam (DCB) test, where a rubber-modified epoxy adhesive was used. The R curves were determined by calculating the energy release rates, GI and GII, based on the beam theory, along with a finite element analysis. The total energy release rate GT (= GI + GII) strongly depended on the I–II mixed mode. This means that it remarkably increased with increasing mode-II component; furthermore, it varied with crack growth from GTC (at the onset of cracking) to GTS (at the steady crack-propagation region). The difference between GTC and GTS increased with the increase in the mode II component. Such R-curve characteristics were discussed based on observation of the fracture surfaces with a scanning electron microscope and the corresponding crack propagation-path behavior.

本文言語English
論文番号102762
ジャーナルInternational Journal of Adhesion and Adhesives
105
DOI
出版ステータスPublished - 2021 3

ASJC Scopus subject areas

  • Biomaterials
  • Chemical Engineering(all)
  • Polymers and Plastics

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