Paper number 259

TIME AND TEMPERATURE DEPENDENCE OF STATIC, CREEP, AND FATIGUE BEHAVIOR FOR FRP ADHESIVE JOINTS

Yasushi Miyano¹, Masayuki Nakada¹, Toshiaki Yonemori¹, Sangwook Sihn²,

and Stephen W. Tsai2
1Materials System Research Laboratory, Kanazawa Institute of Technology,
Yatsukaho, Matto, Ishikawa 924-0838, Japan
2Department of Aeronautics & Astronautics, Stanford University,
Stanford, California 94305-4035, U.S.A.

Summary

We proposed a prediction method of fatigue life for polymer composite structures under an arbitrary frequency, stress ratio (minimum stress/maximum stress), and temperature from the results of constant strain-rate (CSR) test under various temperatures and loading rates, and fatigue tests at a single frequency under various temperatures. Tensile tests of GFRP/metal adhesive joints for CSR and fatigue loadings were conducted for various temperatures and loading rates. The validity of this method was proven for the tensile fatigue life for the GFRP/metal adhesive joints from these test results. Furthermore, the characteristic time-temperature dependent fatigue behavior of this FRP joints was clarified using this prediction method.

Keywords

GFRP, Joints, fatigue strength, life prediction, time-dependent properties.