Failure of a fiber composite lamina under three-dimensional stresses

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The efficient use of thick-section fiber composites requires a proven three-dimensional failure model. Numerous failure criteria have been proposed, but the lack of critical experimental results makes it difficult to assess the accuracy of these models. It is shown that the various predictions for failure of a lamina due to the simple state of uniaxial stress plus superposed hydrostatic pressure are disparate. These differences are sufficient to allow evaluation of failure criteria using data that has the normal scatter found for composite materials. A high-pressure test system for fiber composites is described and results for the effects of pressure on ... continued below

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191 Kilobytes pages

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DeTeresa, S. J. August 31, 1999.

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Description

The efficient use of thick-section fiber composites requires a proven three-dimensional failure model. Numerous failure criteria have been proposed, but the lack of critical experimental results makes it difficult to assess the accuracy of these models. It is shown that the various predictions for failure of a lamina due to the simple state of uniaxial stress plus superposed hydrostatic pressure are disparate. These differences are sufficient to allow evaluation of failure criteria using data that has the normal scatter found for composite materials. A high-pressure test system for fiber composites is described and results for the effects of pressure on the transverse and longitudinal compression strengths of a carbon fiber/epoxy lamina are discussed. Results are compared with a few representative failure models.

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191 Kilobytes pages

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  • ASME IMECE '99, Symposium on Thick Composites for Load-Bearing Structures, Nashville, TN (US), 11/14/1999--11/19/1999

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  • Report No.: UCRL-JC-135664
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 14554
  • Archival Resource Key: ark:/67531/metadc628514

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Office of Scientific & Technical Information Technical Reports

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  • August 31, 1999

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  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 2:28 p.m.

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DeTeresa, S. J. Failure of a fiber composite lamina under three-dimensional stresses, article, August 31, 1999; California. (digital.library.unt.edu/ark:/67531/metadc628514/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.