Effect of cryogenic temperatures on the failure strain and surface morphology of glass fiber

Glass fiber used as reinforced composite presented excellent properties and was used widely in various environment including cryogenic temperature. The failure strain and surface morphology of glass fiber dipped in the liquid nitrogen and room temperature were measured in the study. Through the comparison of two different environment, results showed the glass fiber present better failure strains compared to those at room temperature, and there are no visible defect in the surface of glass fiber after immerged into the liquid nitrogen. The reduction of failure strain in the room temperature would owe dominantly to the relative humidity, but the temperature just exercised less influence on it.