Time-Temperature Dependence of Tensile Fatigue Strength for GFRP/Metal Joint Systems

• Published in: Transactions of the Japan Society of Mechanical Engineers Series A Vol. 69; no. 678; pp. 412 - 419
• Main Authors: MIYANO, Yasushi, TSAI, Stephen W., SEKINE, Naoyuki, NAKADA, Masayuki, KURAISHI, Akira
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 25.02.2003
• Subjects: Fatigue; GFRP; Joint; Time-Temperature Dependence; Viscoelasticity
• ISSN: 0387-5008; 1884-8338
• DOI: 10.1299/kikaia.69.412

The tensile fatigue tests as well as tensile constant elongation-rate (CER) tests for GFRP/metal conical shaped joint, GFRP/metal adhesive joint, and GFRP/metal bolted joint are carried out under various loading rates and temperatures. The tensile fatigue strength as well as the CER strength for these three kinds of GFRP/metal joints depends clearly on time and temperature. The same time-temperature superposition principle for the deformation of matrix resin holds for the CER and fatigue strengths of the corresponding GFRP/metal joint. Therefore, the master curves of fatigue strength for those GFRP/metal joints can be obtained. It was clarified from these master curves that the dependence of time to failure, temperature and number of cycles to failure on fatigue failure load of each GFRP/metal joint shows very characteristic behavior, respectively, and that these dependences on the fatigue failure load of composite structures synthetically evaluated using temperature.