Low Temperature Strength of Metal-FRP Bonded Joints

抄録

This paper is concerned with a criterion of the low-temperature strength for metal-FRP bonded joints. The authors have developed a system of thermal stress analysis of the bonded joints. The results of the analysis for the AL-CFRP bonded joint show remarkable stress concentration caused by the different coefficients of thermal expansion. Experiments on 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°C and-160°C.