Accession Number:

ADA250565

Title:

Design Development and Durability Validation of Postbuckled Composite and Metal Panels. Volume 2. Test Results

Descriptive Note:

Final rept. Sep 1984-Apr 1989

Corporate Author:

NORTHROP CORP HAWTHORNE CA AIRCRAFT DIV

Personal Author(s):

Report Date:

1989-11-01

Pagination or Media Count:

76.0

Abstract:

The objective of this program was to develop design procedures and durability validation methods for curved metal and composite panels designed to operate in the postbuckling range under the action of combined compression and shear loads. This research and technology effort was motivated by the need to develop design and life prediction methodologies for such structures. The program was organized in four tasks. In Task I, Technology Assessment, a complete review of the available test data was conducted to establish the strength, durability, and damage tolerance characteristics of postbuckled metal and composite panels and to identify data gaps that need to be filled. Task II, Data Base Development, was comprised of static and fatigue tests required to fill in the data gaps identified in Task I. New rigorous static analysis methods aimed at improving the accuracy of the existing semi-empirical analysis and life prediction techniques were developed in Task III. Task IV consisted of Technology consolidation where the results of this program were incorporated in the Preliminary Design Guide developed under Contract F33615-81-C-3208 to provide a comprehensive design guide was also exercised in this task, on an actual aircraft fuselage section to illustrate the methodology and demonstrate weight and cost tradeoffs. Buckling, Combined loads, Composite panels, Compression, Curved panels, Design, Durability, Damage tolerance, Fatigue, Impact, Metal panels, Postbuckling, Repair, Shear.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE