High Strain Rate Effects on AS4/PEKK Graphite Fiber Thermoplastic Matrix Composites

摘要

Polymer matrix composites offer excellent mechanicla properties such a shigh specific strength and stiffness which make them attractive for many naval, aerosapce and automotive structural components. Although they are candidate materials for many applications where high strain rate loading is probable, little is known of the material responses to shock loading for most composite materials. Because mechanical properties very significantly with strain rate, the use of static properties in the analysis and design of structures which undergo dynamci loadings can on one hand lead to a very conservative overweight design, or on the other hand can lead to designs which fial prematurely and unexpectedly. The use of dynamic material propeties will ensure the deisgn of composite structures which are weight efficient and structurally sound when they are subjected to dynamic loads.