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N7626291

Publication Date	1976
Personal Author	Schuetze, R.
Page Count	37
Abstract	The development of several landing gear spring blades for lightweight aircraft is discussed. A special sandwich structure provided high longitudinal stresses in the faces and high shear stresses in the sandwich core. The length of the spring blades made a high bending stiffness necessary; therefore apart from glass fibers, reinforcements with higher Young-modulus as carbon- and Kevlar-49-fibers were also provided for tensile sandwich faces. All blades were statically and dynamically tested on a gravitational fall test-bed. Using Kevlar-49-fibers in the tensile sandwich face, the structural weight could be further reduced and damping conditions improved compared with the GRP-sandwich blade. (Author)
Keywords	Carbon fiber reinforced plastics Glass fiber reinforced plastics Landing gear Light aircraft Reinforcing fibers Blades Sandwich structures Springs (Elastic) Stiffness Structural weight West Germany Translations
Source Agency	NASA Foreign Exchange Program
NTIS Subject Category	71F - Composite Materials 51C - Aircraft
Corporate Authors	Deutsche Forschungs- und Versuchsanstalt fuer Luft- und Raumfahrt, Brunswick (West Germany). Abteilung Kunststoffe.
Supplemental Notes	Misc-Report Will Also Be Announced as Translation.
Document Type	Technical Report
NTIS Issue Number	197622

Theoretical and Experimental Investigations on Fiber Reinforced Plastic Landing Gear Spring Blades for Light Aircraft.

Theoretical and Experimental Investigations on Fiber Reinforced Plastic Landing Gear Spring Blades for Light Aircraft.
N7626291

Publication Date	1976
Personal Author	Schuetze, R.
Page Count	37
Abstract	The development of several landing gear spring blades for lightweight aircraft is discussed. A special sandwich structure provided high longitudinal stresses in the faces and high shear stresses in the sandwich core. The length of the spring blades made a high bending stiffness necessary; therefore apart from glass fibers, reinforcements with higher Young-modulus as carbon- and Kevlar-49-fibers were also provided for tensile sandwich faces. All blades were statically and dynamically tested on a gravitational fall test-bed. Using Kevlar-49-fibers in the tensile sandwich face, the structural weight could be further reduced and damping conditions improved compared with the GRP-sandwich blade. (Author)
Keywords	Carbon fiber reinforced plastics Glass fiber reinforced plastics Landing gear Light aircraft Reinforcing fibers Blades Sandwich structures Springs (Elastic) Stiffness Structural weight West Germany Translations
Source Agency	NASA Foreign Exchange Program
NTIS Subject Category	71F - Composite Materials 51C - Aircraft
Corporate Authors	Deutsche Forschungs- und Versuchsanstalt fuer Luft- und Raumfahrt, Brunswick (West Germany). Abteilung Kunststoffe.
Supplemental Notes	Misc-Report Will Also Be Announced as Translation.
Document Type	Technical Report
NTIS Issue Number	197622