Fatigue failure of coarse-grained alumina under contact loading

✍ Scribed by T. Fett; O. Kraft; D. Munz

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 316 KB
• Volume: 36
• Category: Article
• ISSN: 0933-5137
• DOI: 10.1002/mawe.200500857

✦ Synopsis

Abstract

Bars cyclically loaded by oppositely concentrated forces via rollers are appropriate test specimens for the determination of fatigue under contact loading. The contact strengths and numbers of cycles to failure under contact loading were determined for coarse‐grained alumina. From theoretical considerations, it can be concluded that delayed failure in contact fatigue tests is caused by a reduction of the friction between the crack surfaces due to cyclic loading and the related increase of the effective stress intensity factor until the fracture toughness is reached.