Mode-I interlaminar fracture toughness of heat-resistant CFRP at high temperature

Nobuhide Uda, Kousei Ono, Tadashi Nagayasu, Yuichi Hirakawa

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

Abstract

In order to develop a High Speed Civil Transport, weight reduction by the use of advanced composite materials is one of the most important technical issues. However, composite laminates have very low interlaminar fracture resistance. Therefore, the interlaminar fracture toughness of composites has consequently become a critical design parameter for the aircraft structures. In this research, mode-I interlaminar fracture behavior of heat-resistant polyimide CFRP was investigated by way of the double-cantilever-beam (DCB) test at high temperature up to 200°C. In the DCB tests at high temperature, fiber cross-over bridging was observed. In order to evaluate the influence of the bridging zone length on the crack growth resistance curve (R-curve), the DCB tests were conducted using specimens with different thicknesses. Fractographic observations of the fracture surface were performed to assess the crack growth behavior. The bridging characteristics were evaluated using a bridging law which describes the relationship between the crack closure traction resulting from the bridging fibers and the local crack opening displacement.

Original languageEnglish
Title of host publicationAdvanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008
Publication statusPublished - 2008
EventUS-Japan Conference on Composite Materials 2008, US-Japan 2008 - Tokyo, Japan
Duration: Jun 6 2008Jun 7 2008

Other

OtherUS-Japan Conference on Composite Materials 2008, US-Japan 2008
CountryJapan
CityTokyo
Period6/6/086/7/08

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

Uda, N., Ono, K., Nagayasu, T., & Hirakawa, Y. (2008). Mode-I interlaminar fracture toughness of heat-resistant CFRP at high temperature. In Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008