Interlaminar Shear Strength of Woven Carbon, Woven Glass and Woven Carbon/GlassHybrid Laminates under Static and Impact Loading

摘要

Double-lap shear specimens are prepared from woven carbon and woven glass pliesand one carbon and one glass ply specimens prepared from dry woven mats hand lay-up in an epoxy resin matrix. All carbon specimens are prepared from a satin weave carbon/epoxy pre-preg. Tests are performed under static loading using an Instron testing machine and under impact loading using a tensile split Hopkinson bar. The results show that the interlaminar shear stress is highest for the specimens prepared from the carbon/epoxy pre-preg under both static loading and impact loading. For the specimens prepared from dry woven mats and epoxy resin under static loading the interlaminar shear strength is highest for the hybrid hand lay-up and is lowest for the all glass hand lay-up. For the all carbon hand lay-up the interlaminar shear strength is slightly less than that of the hybrid specimen. The results show that interlaminar shear strength is slightly less than that of the hybrid specimen. The results show that interlaminar shear strength is remarkably strain rate dependent. The interlaminar shear strength increases by about 72.6 percent under impact loading for the all glass material, 70.4 percent for the all carbon material, and 55.6 percent for the hybrid material. Under impact loading the interlaminar shear strength is highest for the all carbon hand lay-up and lowest for the all glass hand lay-up. For the hybrid specimen it is slightly less than for the all carbon hand lay-up.