Mechanical properties, microscopy, and failure mechanisms of carbon fiber reinforced epoxy laminated composites

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The mechanical behavior of quasi-isotropic and unidirectional epoxy- matrix carbon-fiber laminated composites subjected to compressive loading at strain rates of 10{sup {minus}3} and 2000 s{sup {minus}1} are described. Failure in the studied composites was dominated by delamination which proceeded by brittle fracture of the epoxy matrix. The matrix-fiber bonding in these composites is very strong and prevented the occurrence of significant fiber-pullout. The mode I delamination strain energy release rate of the unidirectional composites was determined using the double cantilever beam and hole in plate compression methods. The DCB method indicated a significant R curve effect attributed to fiber bridging ... continued below

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11 p.

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Thissell, W. R.; Zurek, A. K. & Addessio, F. December 1995.

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Description

The mechanical behavior of quasi-isotropic and unidirectional epoxy- matrix carbon-fiber laminated composites subjected to compressive loading at strain rates of 10{sup {minus}3} and 2000 s{sup {minus}1} are described. Failure in the studied composites was dominated by delamination which proceeded by brittle fracture of the epoxy matrix. The matrix-fiber bonding in these composites is very strong and prevented the occurrence of significant fiber-pullout. The mode I delamination strain energy release rate of the unidirectional composites was determined using the double cantilever beam and hole in plate compression methods. The DCB method indicated a significant R curve effect attributed to fiber bridging while the presently available hole in plate analytical methods show questionable validity for highly anisotropic materials.

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11 p.

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OSTI as DE96005609

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  • Materials Week `95, Cleveland, OH (United States), 29 Oct - 2 Nov 1995

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  • Other: DE96005609
  • Report No.: LA-UR--95-4217
  • Report No.: CONF-951026--9
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 205115
  • Archival Resource Key: ark:/67531/metadc671371

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  • December 1995

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 8, 2016, 7:31 p.m.

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Thissell, W. R.; Zurek, A. K. & Addessio, F. Mechanical properties, microscopy, and failure mechanisms of carbon fiber reinforced epoxy laminated composites, article, December 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc671371/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.