Accession Number:

ADA026408

Title:

Reliability Prediction for Composite Joints - Bonded and Bolted.

Descriptive Note:

Final rept. 1 May 73-31 Mar 74,

Corporate Author:

GENERAL DYNAMICS/FORT WORTH TEX FORT WORTH DIV

Personal Author(s):

Report Date:

1976-03-01

Pagination or Media Count:

110.0

Abstract:

An experimental program was conducted on coupon-size graphite-epoxy laminate-to-metal joints. Both adhesively bonded and mechanically fastened joints were tested in fatigue to the same random Flight-by-flight0 spectrum to provide lifetime and residual strength data. The empirical data developed for both types of joints was analyzed using structural reliability techniques that included the use of a probabilistic fatigue model previously introduced by Dr. J. C. Halpin of AFML and M. E. Waddoups. The program also included the development of methods for pooling dispersion data to estimate the Weibull shape parameter. Three methods were developed and directly compared Parameter averaging, normalization, and maximum likelihood. The program was a follow-on to the program reported in ARML-TR-72-121, dated March 1972.

Subject Categories:

  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE