NDLI: The experimental behavior of spinning pretwisted laminated composite plates

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The experimental behavior of spinning pretwisted laminated composite plates

Content Provider	NASA Technical Reports Server (NTRS)
Author	Kosmatka, John B. Lapid, Alex J.
Copyright Year	1993
Description	The purpose of the research is to gain an understanding of the material and geometric couplings present in advanced composite turbo-propellers. Twelve pre-twisted laminated composite plates are tested. Three different ply lay-ups (2 symmetric and 1 asymmetric) and four different geometries (flat and 30x pre-twist about the mid-chord, quarter-chord, and leading edge) distinguish each plate from one another. Four rotating and non-rotating tests are employed to isolate the material and geometric couplings of an advanced turbo propeller. The first series of tests consist of non-rotating static displacement, strain, and vibrations. These tests examine the effects of ply lay-up and geometry. The second series of tests consist of rotating displacement, strain, and vibrations with various pitch and sweep settings. These tests utilize the Dynamic Spin Rig Facility at the NASA Lewis Research Center. The rig allows the spin testing of the plates in a near vacuum environment. The tests examine how the material and plate geometry interact with the pitch and sweep geometry of an advanced turbo-propeller.
File Size	6365699
Page Count	228
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940022849
Archival Resource Key	ark:/13960/t4fn63d49
Language	English
Publisher Date	1993-01-01
Access Restriction	Open
Subject Keyword	Composite Materials Propeller Blades Couplings Propellers Plates Structural Members Spin Tests Lay-up Laminates Rotation Leading Edges Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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