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A cohesion model of microcrack toughening

✍ Scribed by Li Zhonghua; Zhao Yong; S. Schmauder

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
839 KB
Volume
44
Category
Article
ISSN
0013-7944

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✦ Synopsis

Absfraet-A cohesion model of microcrack toughening is presented. This model is based on the existence of a K-field around the microcrack process zone. This K-field and the untracked material toughness dictate the unstable crack propagation in brittle materials. The toughening mechanism and the R-curve effect are well described by the model. The toughening magnitude of the microcrack process zone can be easily predicted by the size and the cohesive strength of the microcrack process zone. A comparison between theory and experiment is made and reveals good agreement.

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