Interfacial debonding versus fiber fracture in fiber-reinforced ceramic composites

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Description

Toughening of fiber-reinforced ceramic composites by fiber pullout relies on debonding at the fiber/matrix interface prior to fiber fracture when composites are subjected to tensile loading. The criterion of interfacial debonding versus crack penetration has been analyzed for two semi-infinite elastic plates bonded at their interface. When a crack reaches the interface, the crack either deflects along the interface or penetrates into the next layer depending upon the ratio of the energy release rate for debonding versus that for crack penetration. This criterion has been used extensively to predict interfacial debonding versus fiber fracture for a crack propagating in a ... continued below

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6 p.

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Hsueh, C.H.; Becher, P.F. & He, M.Y. November 1, 1998.

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  • Hsueh, C.H.
  • Becher, P.F. Oak Ridge National Lab., Metals and Ceramics Div., TN (United States)
  • He, M.Y. Univ. of California, Santa Barbara, CA (United States). Materials Dept.

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Description

Toughening of fiber-reinforced ceramic composites by fiber pullout relies on debonding at the fiber/matrix interface prior to fiber fracture when composites are subjected to tensile loading. The criterion of interfacial debonding versus crack penetration has been analyzed for two semi-infinite elastic plates bonded at their interface. When a crack reaches the interface, the crack either deflects along the interface or penetrates into the next layer depending upon the ratio of the energy release rate for debonding versus that for crack penetration. This criterion has been used extensively to predict interfacial debonding versus fiber fracture for a crack propagating in a fiber-reinforced ceramic composite. Two modifications were considered in the present study to address the debonding/fracture problem. First, the authors derived the analysis for a strip of fiber, which had a finite width and was sandwiched between two semi-infinite plates of matrix. It was found that the criterion of interfacial debonding versus fiber fracture depended on the fiber width. Second, a bridging fiber behind the crack tip was considered where the crack tip initially circumvented the fiber. Subsequent to this, either the interface debonded or the fiber fractured. In this case, the authors have considered a bridging-fiber geometry to establish a new criterion.

Physical Description

6 p.

Notes

OSTI as DE99000233

Source

  • 1. China international conference in high-performance ceramics, Beijing (China), 31 Oct - 3 Nov 1998

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  • Other: DE99000233
  • Report No.: ORNL/CP--99522
  • Report No.: CONF-981059--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 290939
  • Archival Resource Key: ark:/67531/metadc678602

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  • November 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 3, 2016, 6:59 p.m.

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Hsueh, C.H.; Becher, P.F. & He, M.Y. Interfacial debonding versus fiber fracture in fiber-reinforced ceramic composites, article, November 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc678602/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.