Abstract
FRP materials show a rather complex damage behavior under cyclic loading, for example, matrix cracking, fiber-matrix debonding, void growth, fiber breakage, etc. Therefore, it is very difficult to evaluate the fatigue damage and remaining life of the FRP. Heat generation is often observed due to damping in the material, which has hysteresis loss, subjected to cyclic load. A part of the heat accumulates with the number of fatigue cycles in the material. FRP materials show temperatures rise remarkably under fatigue test, since the matrix resin is viscoelasticity. It is considered that there is the relation on this fact with the fatigue damage. In this study, we attempted to evaluate the fatigue damage of the glass fiber mat reinforced CP-resin composites by the infrared thermography. Fatigue thermal curves with the various conditions are represented with one line by means of correction according to the stress and the frequency.
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