Accession Number:

ADA170990

Title:

Assessment of Damage Tolerance Requirements and Analysis. Volume 4. Raw Test Data

Descriptive Note:

Final technical rept. Sep 1982-Nov 1985,

Corporate Author:

FAIRCHILD INDUSTRIES INC FARMINGDALE NY FAIRCHILD-REPUBLIC DIV

Personal Author(s):

Report Date:

1986-03-31

Pagination or Media Count:

369.0

Abstract:

Structural test program of typical aircraft structural configuration was conducted to assess the current Air Force damage tolerance design requirements defined in MIL-A-83444. The specimens, made of 2024-T3XX and 7075- T6XX, were subjected to randomized flight-by-flight spectra, representative of fightertrainer and bombercargo type loading spectra, respectively, and to constant amplitude loading spectrum. A total of seventy-two 72 specimens were tested. The test results were correlated with analytical predictions using crack growth and crack initiation methods. As a result of this study, recommendation is provided to the validity of MIL-A-83444, to develop guidelines for selection of critical crack locations, and to assess the state-of-the-art analytical capabilities in prediction crack growth and crack initiation time.

Subject Categories:

  • Bombers
  • Attack and Fighter Aircraft
  • Training Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE