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Title: Notch sensitivity and stress redistribution in three ceramic-matrix composites

Abstract

Fiber-reinforced ceramic-matrix composites (CMCs) depend upon inelastic mechanisms to diffuse stress concentrations associated with holes, notches, and cracks. These mechanisms consist of fiber debonding and pullout, multiple matrix cracking, and shear band formation. In order to understand these effects, experiments have bee conducted on several double-edge-notched CMCs that exhibit different stress redistribution mechanisms. Stresses have been measured an d mechanisms identified by using a combination of methods including X0-ray imaging, edge replication, and thermoelastic analysis. Multiple matrix cracking was found to be the most effective stress redistribution mechanism.

Authors:
; ;  [1];  [2]
  1. Univ. of California, Santa Barbara, CA (United States). High Performance Composites Center
  2. Pratt and Whitney, United Technologies, Jupiter, FL (United States)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
103606
Resource Type:
Journal Article
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 78; Journal Issue: 7; Other Information: PBD: Jul 1995
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; STRESS ANALYSIS; SILICON CARBIDES; CALCIUM SILICATES; ALUMINIUM SILICATES; CARBON; STRAINS; STRESSES; NOTCHES; CRACKS; CRACK PROPAGATION; DAMAGE; INTERFEROMETRY; THERMOELASTICITY; X-RAY RADIOGRAPHY; OPTICAL MICROSCOPY; SCANNING ELECTRON MICROSCOPY

Citation Formats

Mackin, T.J., He, M.Y., Evans, A.G., and Purcell, T.E.. Notch sensitivity and stress redistribution in three ceramic-matrix composites. United States: N. p., 1995. Web. doi:10.1111/j.1151-2916.1995.tb08881.x.
Mackin, T.J., He, M.Y., Evans, A.G., & Purcell, T.E.. Notch sensitivity and stress redistribution in three ceramic-matrix composites. United States. doi:10.1111/j.1151-2916.1995.tb08881.x.
Mackin, T.J., He, M.Y., Evans, A.G., and Purcell, T.E.. Sat . "Notch sensitivity and stress redistribution in three ceramic-matrix composites". United States. doi:10.1111/j.1151-2916.1995.tb08881.x.
@article{osti_103606,
title = {Notch sensitivity and stress redistribution in three ceramic-matrix composites},
author = {Mackin, T.J. and He, M.Y. and Evans, A.G. and Purcell, T.E.},
abstractNote = {Fiber-reinforced ceramic-matrix composites (CMCs) depend upon inelastic mechanisms to diffuse stress concentrations associated with holes, notches, and cracks. These mechanisms consist of fiber debonding and pullout, multiple matrix cracking, and shear band formation. In order to understand these effects, experiments have bee conducted on several double-edge-notched CMCs that exhibit different stress redistribution mechanisms. Stresses have been measured an d mechanisms identified by using a combination of methods including X0-ray imaging, edge replication, and thermoelastic analysis. Multiple matrix cracking was found to be the most effective stress redistribution mechanism.},
doi = {10.1111/j.1151-2916.1995.tb08881.x},
journal = {Journal of the American Ceramic Society},
number = 7,
volume = 78,
place = {United States},
year = {1995},
month = {7}
}