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Title: Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials

Abstract

The development of a reversed flow or cyclic plastic zone is known to play an important role in influencing the growth of fatigue cracks in ductile metals subjected to constant and variable amplitude cyclic loads. In this paper, we present a detailed finite element analysis of the evolution of cyclic damage zones ahead of stationary cracks in brittle materials subjected to zero-tension fatigue loading. The damage mechanism considered here involves isotropic microcracking along grain boundaries and/or interfaces. It is shown that cyclic damage zones are induced ahead of tensile fatigue cracks in microcracking brittle solids when there is irreversible deformation at the crack-tip. The size of the cyclic damage zone and the variation of residual stress fields within the zone have been computed as a function of the extent of irreversibility of crack-tip damage. 15 refs., 5 figs.

Authors:
 [1];  [2]
  1. Brown Univ., Providence, RI (USA). Div. of Engineering
  2. Aluminum Co. of America, Alcoa Center, PA (USA). Alcoa Research Lab.
Publication Date:
Research Org.:
Brown Univ., Providence, RI (USA). Div. of Engineering
Sponsoring Org.:
DOE/ER
OSTI Identifier:
6964803
Report Number(s):
CONF-900764-1
ON: DE90008372
DOE Contract Number:  
FG02-84ER45167
Resource Type:
Conference
Resource Relation:
Conference: Fatigue 90 international conference, Honolulu, HI (USA), 15-20 Jul 1990
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM OXIDES; CRACK PROPAGATION; CERAMICS; SILICON CARBIDES; COMPOSITE MATERIALS; CRACKS; FATIGUE; FINITE ELEMENT METHOD; GRAIN BOUNDARIES; INTERFACES; ALUMINIUM COMPOUNDS; CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; CRYSTAL STRUCTURE; MATERIALS; MECHANICAL PROPERTIES; MICROSTRUCTURE; NUMERICAL SOLUTION; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; 360203* - Ceramics, Cermets, & Refractories- Mechanical Properties

Citation Formats

Suresh, S, and Brockenbrough, J R. Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials. United States: N. p., 1989. Web.
Suresh, S, & Brockenbrough, J R. Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials. United States.
Suresh, S, and Brockenbrough, J R. Wed . "Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials". United States.
@article{osti_6964803,
title = {Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials},
author = {Suresh, S and Brockenbrough, J R},
abstractNote = {The development of a reversed flow or cyclic plastic zone is known to play an important role in influencing the growth of fatigue cracks in ductile metals subjected to constant and variable amplitude cyclic loads. In this paper, we present a detailed finite element analysis of the evolution of cyclic damage zones ahead of stationary cracks in brittle materials subjected to zero-tension fatigue loading. The damage mechanism considered here involves isotropic microcracking along grain boundaries and/or interfaces. It is shown that cyclic damage zones are induced ahead of tensile fatigue cracks in microcracking brittle solids when there is irreversible deformation at the crack-tip. The size of the cyclic damage zone and the variation of residual stress fields within the zone have been computed as a function of the extent of irreversibility of crack-tip damage. 15 refs., 5 figs.},
doi = {},
url = {https://www.osti.gov/biblio/6964803}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {11}
}

Conference:
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