Low-Temperature Strength of Metal-FRP Bonded Joints

• Published in: Transactions of the Japan Society of Mechanical Engineers Series A Vol. 56; no. 523; pp. 437 - 445
• Main Authors: MORI, Takao, YU, Qiang, TAKEHANA, Souji, SHIRATORI, Masaki
• Format: Journal Article
• Language: English; Japanese
• Published: The Japan Society of Mechanical Engineers 1990
• Subjects: Bonded Joint; Criterion of Strength; Fiber-Reinforced Plastics; Finite Element Method; Mises Equivalent Stress; Thermal Stress Analysis
• ISSN: 0387-5008; 1884-8338
• DOI: 10.1299/kikaia.56.437

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 "σmax = σf" where σmax is the maximum von Mises equivalent stress due to external load and thermal stress while σf 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.