Abstract: A blade fabricated of a plurality of bonded filament laminates, at least one of the laminates characterized by a plurality of continuous, collimated filaments embedded in a different matrix at the blade tip than at the blade root. The matrices are characterized by different relative impact strengths.

Abstract: The specification and drawings disclose a method and apparatus for rolling plural metal strips simultaneously to form thinner metal strip or foil. The method allows use of larger diameter rolls and simpler roll supporting structure and mill controls than heretofore possible in foil forming. The disclosed method contemplates the provision of a plurality of metal strips which are then bonded together in juxtaposed relationship with a thin layer of matrix material which substantially completely covers the opposed faces of the strips to form a composite comprising alternate layers of metal strip and matrix material. Thereafter the composite is rolled to reduce the strips to the desired thickness. Subsequently, the bond between the strips is destroyed and the strips are separated. According to certain embodiments, strong or low ductility metals can be formed into foils by bonding them in the central portion of the composite. Weaker or more ductile metals form the outer portions of the composite.