金属-FRP接着継手の低温強度

概要

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This paper is concerned with a criterion of the low-temperature strength for the metal-FRP bonded joints. The authors have developed a system of thermal stress analysis of the bonded joints. The results of the analysis for AL-CFRP bonded joints show the remarkable stress concentration caused by the different coefficients of thermal expansion. Experiments on the low-temperature strength have been well explained by the criterion "σ_<max> = σ_f" where σ_<max> is the maximum von Mises equivalent stress due to external load and thermal stress while σ_f is the fracture stress for the specific temperature. The above criterion also gives the characteristic low-temperature strength for AL-CFRP and AL-GFRP bonded joints between 23℃ and -160℃.金属-FRP接着継手構造は低温環境下での使用が多い．低温強度評価法確立のために熱応力解析システムの開発，低温での強度試験を行い低温強度評価について常温強度評価法を拡張することを試みる．
1990-03-25