Design, Fabrication, Installation and Flight Service Evaluation of A Composite Cargo Ramp Skin On A Model CH-53 Helicopter.

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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1983
Accession Number
ADA305579

Entities

People

  • D. W. Lowry
  • M. J. Rich

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Bearing Strength
  • Composite Materials
  • Energy Levels
  • Fabrication
  • Fasteners
  • Films
  • Impact Tests
  • Materials
  • Materials Processing
  • Materials Testing
  • Mechanical Working
  • Resins
  • Shear Flow
  • Test And Evaluation
  • Test Methods

Readers

  • Aerospace Engineering
  • Structural Health Monitoring of Composite Structures.
  • ballistics.