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Record Details

Record 32 of 20005
Free-Roller Versus Fixed-Roller Fixtures in Flexure Testing of Advanced Ceramic Materials
Author and Affiliation:
Salem, Jonathan A.(NASA Lewis Research Center, Cleveland, OH United States)
Choi, Sung R.(Cleveland State Univ., Cleveland, OH United States)
Abstract: The error associated with strength measurements made with fixed-roller and V-grooved roller figures was studied with a variety of roller and figure material combinations. Both the fixed-roller and the V-grooved fixtures yielded an error in stress of about 4 to 7%. They also exhibited an appreciable amount of load strain hysteresis. Dynamic fatigue testing of 96 wt.% alumina verified the error: the fatigue strength was overestimated by 7 to 9% for the fixed roller configuration. The source of error is exclusively attributed to friction between the rollers and the specimen surface, as verified by previous investigators.
Publication Date: Jan 01, 1996
Document ID:
20010037713
(Acquired Apr 30, 2001)
Subject Category: NONMETALLIC MATERIALS
Document Type: Reprint
Publication Information: Ceramic Engineering and Science Proceedings; p. 69-77; Volume 17
Publisher Information: American Ceramic Society, United States
Contract/Grant/Task Num: DE-AC05-84OR-21400
Financial Sponsor: Department of Energy; Office of Transportation Technologies; Washington, DC United States
Organization Source: NASA Lewis Research Center; Cleveland, OH United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CERAMICS; FLEXURAL STRENGTH; FLEXING; ROLLERS; MECHANICAL PROPERTIES; FIXTURES; ERROR ANALYSIS; LOADS (FORCES); ALUMINUM OXIDES; FLEXIBILITY; FATIGUE TESTS
Availability Source: Other Sources
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