Hybrid Composite Structures Made From Polybenzoxazole Fibers

Hybrid composite-material (fiber/matrix) structures of a proposed type would incorporate recently developed polybenzoxazole (PBO) fibers that feature high strengths and high moduli of elasticity and which can be made in much thinner sections than are possible with graphite fibers. The PBO fibers could be used, for example, in skins, face sheets, or panels, any or all of which could be made as multiple-angle-ply layups.