Abstract
This paper deals with influence of the reinforcements on the variation of tensile strength of the glassfiber reinforced unsaturated polyester resin laminate with U type notch. The reinforcements treated in this experiment are plain cloth and chopped strand mat. The main results obtained are summarized as follows;
1) The mean value of tensile strength of the specimen with notch is lower than that of the flat specimen, and the strength degradation ratio of Cloth FRP is smaller than that of Mat FRP.
2) The coefficient of variation of tensile strength of the specimen with notch is larger than that of the flat specimen. This tendendy is remarkable in Mat FRP.
3) The mean value and the coefficient of variation of the strength degradation ratio were obtained by applying the first order second moment method.
