Influence on the mechanical behavior of carbon fiber fabric reinforced PPS laminates under different temperature

In this paper, the influence of temperature on the mechanical behavior of carbon fiber fabric reinforced PPS laminates was investigated through the experimental method. In order to obtain the strength and the failure mechanisms of carbon fiber fabric reinforced PPS laminates under the different temperature, three different tests (tensile, compressive and flexural) were carried out at five temperature points (23℃、60℃、90℃、120℃ and 150℃). The resulting experimental database is of the almost importance for generating design allowable for structure integrating such thermoplastic-based composites. It can be obtained that the viscoplastic behavior of the PPS resin can be enhanced with increase of temperature around its glass transition temperature (T g =98℃). However, the interface intensity between the fiber/matrix will be reduced with increase of temperature. Therefore, the mechanical properties of the compressive and flexural will be also reduced with increase of temperature. Whereas the influence of temperature on the tensile modulus and tensile strength of carbon fiber fabric reinforced PPS laminates is small. From the microscopic observations it can be obtained that the influence of temperature on the failure mechanisms is obvious. Due to the softening of PPS resin with the temperature increasing higher than the glass transition temperature, the failure mode of carbon fiber fabric reinforced PPS laminates was changed at elevated temperature, particularly in the compressive test and flexural test.