期刊
ENGINEERING FRACTURE MECHANICS
卷 146, 期 -, 页码 210-223出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2015.07.045
关键词
Impeller; FV520B steel; Loading rate; Dynamic fracture; Failure assessment
类别
资金
- National Basic Research Program of China [2012CB026003]
- Natural Science Foundation of China [51305122]
The dynamic fracture assessment method applied to a cracked centrifugal impeller subjected to dynamic loading is the focus of this study. J-integral histories and loading rates at crack tips were evaluated by numerical simulation through ABAQUS and Zencrack software. True stress-strain relations, fracture mechanism and fracture toughness of the impeller material FV520B steel were investigated over a wide range of loading rates by experimental and theoretical methods. Fracture assessment with consideration to rate effects was then conducted based on the CEGB R6 procedure. The present method demonstrated advantages over existing methods evaluated by an equivalent static load. (C) 2015 Elsevier Ltd. All rights reserved.
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