Determination of the stress distributions in a ceramic: Tensile specimen using numerical techniques

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:7155294

Jenkins, M G; Ferber, M K; Tennery, V J ^[1]; Salem, J A ^[2]

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1. Oak Ridge National Lab., TN (USA)
2. National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center

Finite element analyses (FEA) were used to determine the stress distributions in a ceramic, tensile specimen with two types of button-head gripping systems. The FEA revealed stress raisers at both the button-head and the transition from the gage section to the shank. However, the stress field within the bulk of the gage section is uniform and uniaxial. The stress ratio, k{sub t}, between the button-head and gage section stresses varied from 0.35 to 0.72 for the tapered collet or the straight collet systems,respectively. Previous empirical tests confirm these results whereby, the tapered collet system, compared to the straight collet system, sustained over twice the average load before failure at the button-head. 33 refs., 14 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7155294
• Report Number(s): CONF-900837-2; ON: DE90010499
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE
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Cermets
& Refractories-- Mechanical Properties
CERAMICS
DEFECTS
ENGINES
FINITE ELEMENT METHOD
FRICTION
HEAT ENGINES
MATERIALS TESTING
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
SLIDING FRICTION
STRESSES
TESTING
TRANSPORTATION SECTOR
ULTIMATE STRENGTH