Impact resistance and energy absorption mechanisms in hybrid composites

摘要: Abstract The response of hybrid composites to low-velocity impact loading has been investigated. energy absorbing mechanisms laminates containing various fibers were studied primarily by means the instrumented falling dart testing technique. Static indentation tests and scanning electron microscopy (SEM) also employed assist in identification failure mechanisms. polyethylene (PE) fibers, which high strength ductility, found be effective both dissipating resisting through penetration. Polyester (PET) fiber reinforced epoxy exhibited superior characteristics even though PET fabric layers without did not have good modulus or ductility. Good capability was observed with woven fabrics made high-performance Nylon fibers. Nylon, PE enhance resistance graphite composites. Upon loading, either general a great degree flexural plastic deformation some level delamination, thereby significant amount strain energy. Hybrids showed analogous behavior, but lesser degree. stacking sequence play critical role controlling delamination. This implies that is major factor governing overall sorbing structure. penetration appeared dictated toughness (strength plus ductility) their constituent must measured under rate conditions.