PROBABILISTIC  MODELING OF BRITTLE FRACTURE  WITH PRIOR  DUCTILE CRACK  EXTENSION

Abstract

Abstract: A computation framework for brittle fracture which incorporates weakest link statistics and a microme- chanics model reflecting reflecting local damage of the material is described.The Weibull stress W emerges as a probabilistic fracture parameter to define the condition leading material failure. Unstable crack propa- gation occurs at a critical value of W which may be attained paior to or following some amount of duc- tile crack extension. A realistic model of ductile crack growth using the computation cell methodology is used to define the evolution of near tip stress fields during crack extension. An application of proposed framework to predict the measured geometry and ductile tearing effects on the statistical distributio of fracture toughness for the pipe line steel welded joint is described.

Key words: fracture toughness, ductile crack extension, brittle fracture

H. Y. Jing; L. X. Huo; Y. F. Zhang and F. Minami( 1) College of Material Science, Tianjin University, Tianjin 300072,China 2) Osaka University, Japan). PROBABILISTIC MODELING OF BRITTLE FRACTURE WITH PRIOR DUCTILE CRACK EXTENSION[J]. Acta Metallurgica Sinica (English Letters), 2000, 13(1): 98-102.

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[10]	L.F Li;YY Li;O. Sbaizeroand S. Meriani(Cryoguic Laboratory Chinese Academy of Sciences, Beijing 100080, China )(Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China)(Materials Engineering Department, University of Triesty, Italy). CERAMICS AS CANDIDATE STRUCTURAL MATERIALS FOR CRYOGENIC APPLICATIONS [J]. Acta Metallurgica Sinica (English Letters), 1997, 10(3): 179-183.
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PROBABILISTIC MODELING OF BRITTLE FRACTURE WITH PRIOR DUCTILE CRACK EXTENSION

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