Accession Number:

ADA301542

Title:

A Comparison of the Static and Fatigue Strengths of Formed and Drilled Holes in Composite Laminates.

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA

Personal Author(s):

Report Date:

1977-05-31

Pagination or Media Count:

35.0

Abstract:

Holes in structural members introduce areas of high stress concentration When laying-up a laminate composite, it is possible to form the holes before cure, instead of cutting the fibers by drilling the holes after cure. The diverted fibers maintain their continuity and provide added strength in the highly stressed region around the hole. Accordingly, it was hypothesized that a laminate with formed holes would be stronger than a similar laminate with drilled holes.

Subject Categories:

  • Aircraft
  • Laminates and Composite Materials
  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE