Reliability Prediction for Composite Joints - Bonded and Bolted

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-flight) 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.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1976
Accession Number
ADA026408

Entities

People

  • G. H. Lemon
  • R. V. Wolff

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Advanced Electronics
  • Human Systems

DTIC Thesaurus Topics

  • Air Force
  • Air Superiority Fighters
  • Composite Materials
  • Data Sets
  • Databases
  • Epoxy Laminates
  • Fabrication
  • Failure Mode And Effect Analysis
  • Fatigue Tests (Mechanics)
  • Laminates
  • Materials
  • Materials Laboratories
  • Materials Testing
  • Mechanics
  • Test And Evaluation
  • Test Facilities
  • Test Methods

Readers

  • Regression Analysis.
  • Structural Health Monitoring of Composite Structures.
  • Technical Research and Report Writing.