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Fatigue failure of coarse‐grained alumina under contact loading
Author(s) -
Fett T.,
Kraft O.,
Munz D.
Publication year - 2005
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.200500857
Subject(s) - materials science , composite material , fracture toughness , fracture (geology) , toughness , fatigue testing , structural engineering , forensic engineering , engineering
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.