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Tensile Fracture Toughness Measurements in Ceramics
Author(s) -
Tschegg Elmar K.,
Suresh Subra
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb04960.x
Subject(s) - materials science , fracture toughness , composite material , rod , tension (geology) , ceramic , ultimate tensile strength , fracture (geology) , toughness , compression (physics) , medicine , alternative medicine , pathology
A novel procedure is outlined whereby fracture toughness values for ceramics can be measured under uniaxial tension (mode I) in specimens containing a fatigue crack. Circumferentially notched rods of rapolycrystalline aluminum oxide were precracked in cyclic compression to introduce a fatigue crack at room temperature, following the technique proposed by Suresh and co‐workers. 7,10,11 Subsequently, the precracked rods were fractured in pure tension. Highly reproducible values of fracture toughness were obtained using this method.