Accession Number : ADA305579
Title : Design, Fabrication, Installation and Flight Service Evaluation of A Composite Cargo Ramp Skin On A Model CH-53 Helicopter.
Descriptive Note : Contractor rept.,
Corporate Author : UNITED TECHNOLOGIES CORP STRATFORD CT SIKORSKY AIRCRAFT DIV
Personal Author(s) : Lowry, D. W. ; Rich, M. J.
PDF Url : ADA305579
Report Date : APR 1983
Pagination or Media Count : 35
Abstract : This report presents the work performed for the installation of a composite skin panel on the cargo ramp of a Sikorsky CH-53D marine helicopter. The composite material is of Kevlar/Epoxy (K/E) which replaces aluminum outer skins on the aft two bays of the ramp. The cargo ramp aft region was selected as being a helicopter airframe surface subjected to possible significant field damage and would permit an evaluation of the long term durability of the composite skin panel. A structural analysis was performed and the skin shears determined. Single lap joints of K/E riveted to aluminum were statiscally tested. The joint tests were used to determine bearing allowables and the required K/E skin gage. K/E skin panels riveted to aluminum edge members were tested in a shear fixture to confirm the allowable shear and bearing strengths.
Descriptors : *COMPOSITE STRUCTURES, *HELICOPTERS, *SKIN(STRUCTURAL), TEST AND EVALUATION, FLIGHT TESTING, DAMAGE, COMPOSITE MATERIALS, EDGES, PANELS, STRUCTURAL ANALYSIS, REGIONS, SURFACES, ALUMINUM, STRENGTH(GENERAL), CARGO, AIRFRAMES, EXTERNAL, RAMPS, STRUCTURAL COMPONENTS, JOINT TEST AND EVALUATION, BAYS.
Subject Categories : Helicopters
Laminates and Composite Materials
Structural Engineering and Building Technology
Distribution Statement : APPROVED FOR PUBLIC RELEASE