期刊
ENGINEERING FRACTURE MECHANICS
卷 134, 期 -, 页码 35-53出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2014.12.006
关键词
Key-hole notch; Brittle fracture; Maximum tangential stress; Mean stress; Mixed mode loading
类别
Brittle fracture was studied experimentally and theoretically for key-hole notches under mixed mode loading. Brazilian disk specimen containing a dumbbell-shaped slit and made of polymethyl-methacrylate was proposed to measure the notch fracture toughness and the fracture initiation angle at room temperature. The experimental results were predicted by the maximum tangential stress and the mean stress criteria. Two groups of critical distances were utilized in the criteria. The first one was equal to that for sharp cracks and the second one was directly obtained from the fracture tests. It was found that both the criteria could predict the experimental results successfully. (C) 2014 Elsevier Ltd. All rights reserved.
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