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Evaluation of Bridging Parameters in Aluminas from R ‐Curves by Use of the Fracture Mechanical Weight Function
Author(s) -
Fett Theo,
Munz Dietrich,
Thun Gerhard,
Bahr HansAchim
Publication year - 1995
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.1151-2916.1995.tb08420.x
Subject(s) - bridging (networking) , materials science , weight function , crack growth resistance curve , composite material , fracture (geology) , fracture mechanics , extension (predicate logic) , crack closure , mathematics , mathematical analysis , computer science , computer network , programming language
Coarse‐grained Al 2 O 3 shows an R ‐curve behavior which is characterized by an increase in crack growth resistance with increasing crack extension. In case of alumina, this effect is caused by crack‐border interactions in the wake of the advancing crack. In the first part of the paper, the weight function method for the determination of bridging stresses from controlled fracture tests is described. In the second part, this procedure is applied for the evaluation of our own experimental results as well as results available in the literature.