Abstract
In order to clarify the mechanism of the effect of specimen diameter on impact strength of FRP in the edge-wise direction obtained by the Hopkinson pressure bar method, the compressive creep tests were perfomed on FRP and polyester resin used as the matrix of FRP and the effects of time and temperature on the compressive properties of these materials were investigated.
From the experiments, it was found that the principle of time-temperature superposition was applicable for both the creep compliance of polyester and the compressive creep strength of FRP.Then, a prediction method of the compressive creep strength of FRP was derived based on the law of composite where the visco-elastic properties of the matrix was taken into account. The mechanism of the diameter dependence of the observed impact strength of FRP was explained by the present prediction method.
