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Fracture Resistance Characteristics of a Metal‐Toughened Ceramic
Author(s) -
Flinn Brian D.,
Lo Calvin S.,
Zok Frank W.,
Evans Anthony G.
Publication year - 1993
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.1151-2916.1993.tb03794.x
Subject(s) - materials science , bridging (networking) , composite material , softening , ceramic , composite number , reinforcement , fracture (geology) , flow stress , traction (geology) , microstructure , geology , computer network , geomorphology , computer science
The fracture characteristics of an Al 2 O 3 /Al composite are examined. Measurements of resistance curves and work of rupture are compared with predictions of a micromechanical model, incorporating the effects of crack bridging by the Al reinforcements. The bridging traction law is assumed to follow linear softening behavior, characterized by a peak stress, σ c , and a critical stretch‐to‐failure, u c . The values of σ c and u c inferred from such comparisons are found to be broadly consistent with independent measurements of stretch‐to‐failure, along with the measured flow characteristics of the Al reinforcement. The importance of large‐scale bridging on the fracture resistance behavior of this class of composite is also demonstrated through both the experiments and the simulations.