Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials

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

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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:

Suresh, S ^[1]; Brockenbrough, J R ^[2]

Brown Univ., Providence, RI (USA). Div. of Engineering
Aluminum Co. of America, Alcoa Center, PA (USA). Alcoa Research Lab.

Publication Date:: 1989-11-01

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

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                    Suresh, S, and Brockenbrough, J R. Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials.  United States: N. p., 1989. 
        Web.

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                    Suresh, S, & Brockenbrough, J R. Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials.  United States.

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                    Suresh, S, and Brockenbrough, J R. Wed .  
        "Cyclic damage zones ahead of tensile fatigue cracks in ceramic materials".  United States.

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@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}

}

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