Fatigue crack growth in ceramic materials at ambient and elevated temperatures

Conference · Wed Nov 01 00:00:00 EST 1989

OSTI ID:7009088

Suresh, S

The mechanics and mechanisms of stable fatigue crack growth in a wide variety of ceramics and ceramic composites are examined in detail. Experimental results on crack growth, numerical analyses and microscopic observations of crack-tip damage zones are presented to illustrate fatigue processes with: (1) a mode of failure that is distinctly different from that seen under static loads; (2) kinematic irreversibility of microscopic deformation which leads to cyclic damage zones, analogous to cyclic plastic zones in metal fatigue; and (3) crack velocities which are distinctly different from those found under static load failure due to a mechanical-environmental synergistic effect or as a result of purely mechanical contact phenomena such as crack closure, crack bridging by grains or reinforcements, or wedging of crack faces by debris particles. 19 refs., 6 figs.

• Research Organization: Brown Univ., Providence, RI (USA). Div. of Engineering
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-84ER45167
• OSTI ID: 7009088
• Report Number(s): DOE/ER/45167-2; CONF-900764-2; ON: DE90008418
• Resource Relation: Conference: Fatigue 90 international conference, Honolulu, HI (USA), 15-20 Jul 1990
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CRACK PROPAGATION
CERAMICS
SILICON CARBIDES
COMPRESSION
DEFORMATION
FATIGUE
WHISKERS
ALUMINIUM COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CRYSTALS
MECHANICAL PROPERTIES
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties