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Analyses of damage localization at crack tip in a brittle damaged material

โœ Scribed by Xi-Qiao Feng; Shou-Wen Yu

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
542 KB
Volume
53
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

Using the analysis method of the Dugdale-Barenblatt model and considering the rapid stress drop and strain softening of material, the fracture process zone at the near tip of a mode-I crack in a brittle damaged material is studied. It is pointed out that under external loads a narrow strip zone of damage localization, i.e. a damage localization band, will form ahead of the crack and it is impossible that a complete damage zone with a finite width occurs around the crack tip. A central crack and semi-infinite crack in infinite sheets have been taken as examples; the relations between the length of the damage localization band and external loads are obtained. The structures of crack tip fields in a brittle damaged material are shown.

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