Effects of temperature on tensile property of three-dimension and five-direction

The tensile properties of three-dimension and five-direction braided/epoxy resin composites and laminated resin composites at temperature of room、 80℃, 150℃ and 180℃ were studied. The effect rules of different temperature on the tensile property of these composites were discussed. The reasons for the variations of tensile property of these composites at different temperature were also analyzed.  The tensile strength of three-dimension and five-direction braided composites at 80℃ and 150℃ keeps the same level with that at room temperature. At 180℃, the tensile strength of three-dimension and five-direction braided composites decreases by 15.37% compared with that at room temperature. At 80℃、 150℃ and 180℃, the tensile strength of laminated composite decreases by 3.45%, 13.3% and 34.42%, respectively compared with that at room temperature. The significant decrease  for the tensile strength of laminated composites  at high temperature is due to the delamination of the laminated composites since the resin damaged, which shows that structures of reinforcements have significant influences on tensile property of resin composites at high temperature.