Accession Number:

AD0729050

Title:

Development of a Graphite Horizontal Stabilizer.

Descriptive Note:

Semi-annual interim technical rept. no. 3, 1 Nov 70-30 Apr 71,

Corporate Author:

DOUGLAS AIRCRAFT CO LONG BEACH CALIF

Report Date:

1971-07-01

Pagination or Media Count:

206.0

Abstract:

Testing of graphite-epoxy composite beam and box-beam components is completed and the test results are interpreted to indicate design modifications needed in the graphite- epoxy composite stabilizers. Theoretical bending and torsional deflections of the box-beam acompared favorably with test results. Allowable stresses in xompression, shear, tension, and bearing were measured and deduced from test results and used to re- assess margins-of-safety in the stabilizer design. Design modification options to eliminate the negative margins-of-safety involved the local reinforcing of the upper skin panel or the use of bonding in additon to bolting for attachment of the upper panel. After evaluation of the design options, the use of bolting and bonding was selected on the basis of reduced weight, increased strength and reliability, and minimum impact on detail design, tooling, schedule and cost. Author, modified-PL

Subject Categories:

  • Attack and Fighter Aircraft
  • Refractory Fibers
  • Laminates and Composite Materials
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE