Effect of interfacial nanostructure on mode mixity in directly bonded carbon fiber reinforced thermoplastic laminates and aluminum alloy with thermal stresses

Hiroki Ota, Kristine Munk Jespersen, Kei Saito, Keita Wada, Kazuki Okamoto, Atsushi Hosoi, Hiroyuki Kawada

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In recent years, for the aim of weight reduction of transportation equipment, carbon fiber reinforced thermoplastics (CFRTPs), which have high recyclability and formability, are becoming suitable for mass production. Additionally, with the development of multi-material structures, excellent technologies for joining metal and CFRTPs are required. In present industry, joining between dissimilar materials include adhesive bonding and mechanical joining methods, however, these methods still have some problems, and therefore an alternative bonding method without adhesive and mechanical joining is required for joining CFRTPs and metals. Thus, this study focused on direct bonding between CFRTP and an aluminum alloy, by producing a nanostructure on the surface of the aluminum alloy. The nanostructure penetrates the CFRTP matrix causing an anchoring effect, which results in significant bonding strength improvement. The influence of the nanostructure on the fracture toughness for the directly bonded CFRTP and aluminum was evaluated by static double cantilever beam (DCB) testing. Due to the difference of the thermal expansion coefficients between the CFRTP laminates and the aluminum alloy, significant residual stresses are generated. The effect of the thermal residual stresses on the fracture toughness along with the resulting mode mixity (mode ? and ?) was calculated. It is found that the thermal stresses introduce a significant mode mixity of the fracture toughness.

Original languageEnglish
Title of host publicationJSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791883624
DOIs
Publication statusPublished - 2020
EventJSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020 - Virtual, Online
Duration: 2020 Sep 3 → …

Publication series

NameJSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020

Conference

ConferenceJSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing, LEMP 2020
CityVirtual, Online
Period20/9/3 → …

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science (miscellaneous)
  • Instrumentation

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