Fatigue Behavior of Adhesively Bonded Joints. Volume II. Appendices.

Abstract

The fatigue behavior of adhesively bonded aluminum joints was investigated analytically and experimentally. Stress distributions in the adhesive interlayer were calculated to guide planning of the joint tests and the interpretation of the test results. Finite element stress analyses were conducted using a linear elastic, and a three-element linear viscoelastic model for the adhesive behavior. Thick adherend lap-shear specimens of the model joint configuration were fabricated and tested. These specimens were instrumented and subjected to sinusoidal fatigue tests at several frequencies, humidities and temperatures. Certain tests were interrupted at various stages and the specimens examined for fatigue damage. Damage was found to initiate in the (calculated) high stress regions, and to propagate with further load cycling. Observations and recommendations resulting from the investigation are included in this final report. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1980
Accession Number
ADA087360

Entities

People

  • John Romanko
  • W. G. Knauss

Organizations

  • General Dynamics

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Adhesives
  • Aeronautical Laboratories
  • Air Force
  • Air Force Facilities
  • Bonded Joints
  • Boundaries
  • Boundary Value Problems
  • Equations
  • Government Procurement
  • Governments
  • Joints
  • Materials
  • Materials Laboratories
  • Mechanics
  • Spectra
  • Thermal Expansion
  • Water Vapor

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  • Structural Health Monitoring of Composite Structures.