Interlaminar strains at the free edge of a hole in laminated composites: An experimental study

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Description

Free-edge effects in laminated composite materials were studied experimentally using high-sensitivity moire interferometry. Six laminates from two material systems were tested in uniaxial compression on an electro-mechanical testing machine. Interlaminar deformations were measured on a ply-by-ply basis at the straight free-edge and, for the first time, on the cylindrical surface of a hole. Strain distributions were determined with high fidelity for the hole surface and the straight free edge of the thick composite panels. Comparisons were made on a ply-by-ply basis for the transverse and tangential strains at the horizontal centerline of the hole (90{degree} location) and the corresponding plies ... continued below

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12 p.

Creation Information

Boeman, R.G. December 31, 1993.

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  • Boeman, R.G. Oak Ridge National Lab., TN (United States). Engineering Technology Div.

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Description

Free-edge effects in laminated composite materials were studied experimentally using high-sensitivity moire interferometry. Six laminates from two material systems were tested in uniaxial compression on an electro-mechanical testing machine. Interlaminar deformations were measured on a ply-by-ply basis at the straight free-edge and, for the first time, on the cylindrical surface of a hole. Strain distributions were determined with high fidelity for the hole surface and the straight free edge of the thick composite panels. Comparisons were made on a ply-by-ply basis for the transverse and tangential strains at the horizontal centerline of the hole (90{degree} location) and the corresponding plies at the straight boundaries.

Physical Description

12 p.

Notes

OSTI as DE96010726

Source

  • 8. American Society for Composites conference on composite materials, Cleveland, OH (United States), 19-21 Oct 1993

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  • Other: DE96010726
  • Report No.: CONF-9310291--1
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/238560 | External Link
  • Office of Scientific & Technical Information Report Number: 238560
  • Archival Resource Key: ark:/67531/metadc671782

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Creation Date

  • December 31, 1993

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Jan. 25, 2016, 1:52 p.m.

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Boeman, R.G. Interlaminar strains at the free edge of a hole in laminated composites: An experimental study, report, December 31, 1993; Tennessee. (digital.library.unt.edu/ark:/67531/metadc671782/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.