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Experimental Mechanics

, Volume 30, Issue 4, pp 345–351 | Cite as

Strain and stress concentrations in composite laminates containing a hole

  • S. C. Tan
  • R. Y. Kim
Article

Abstract

The strain concentrations of orthotropic composite laminates containing a circular hole and subject to tensile loading were measured experimentally using strain gages. Then the stress concentrations were calculated using the strain distributions in the initial region of the stress-strain curve before any microdamages were developed. The graphite/epoxy AS4/3502 [O2/±45]2s and [45]4s were chosen to represent fiber-dominated and matrix-dominated laminates, respectively. Several combinations of hole-diameter/plate-width ratio were designed to show the width effect. The conditions of the laminates, after the holes were drilled, were examined using X-ray techniques. Good correlation was obtained between theory and experimental result using specimens in good condition (without machining damages). A procedure for accurately determining the strain and stress concentrations is given.

Keywords

Mechanical Engineer Fluid Dynamics Stress Concentration Good Condition Strain Gage 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Society for Experimental Mechanics, Inc. 1990

Authors and Affiliations

  • S. C. Tan
    • 1
  • R. Y. Kim
    • 2
  1. 1.Wright Patterson AFB
  2. 2.University of Dayton Research InstituteDayton

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