APPLICATION OF MICROMECHANICS TO JOINTS AND CUTOUTS

Abstract

The stress distribution in loop and bolt joints made of composite materials is studied using analytical and experimental methods. Also, the stress concentration in orthotropic composite sheets with a circular hole is studied. The numerical technique to evaluate the stresses and displacements is described. Simple design formulas to compute the stresses at critical regions are developed. A procedure of structural design is delineated and applied to specific cases. Experimental results obtained by testing composite joints are reported. Stress distribution tests were performed using the photoelastic technique. Failure location and ultimate loads for several composite joints are shown. This report contains the analysis of the stress concentration that appears around a circular hole in an orthotropic composite sheet under simple tension and simple shear loadings.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1969
Accession Number
AD0688168

Entities

People

  • Alberto H. Puppo
  • Juan A. Haener

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Army Aviation
  • Complex Variables
  • Composite Materials
  • Computer Programs
  • Contracts
  • Diagrams
  • Elastic Properties
  • Equations
  • Fabrication
  • Government Procurement
  • Materials
  • Mechanics
  • Micromechanics
  • Radial Stress
  • Stress Analysis
  • Stress Concentration
  • Stresses

Fields of Study

  • Engineering

Readers

  • Structural Health Monitoring of Composite Structures.