期刊
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
卷 128, 期 -, 页码 644-651出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmecsci.2017.06.002
关键词
Single-edge tension (SE(T)) specimen; Crack tip opening displacement; Thickness effects; Pipeline steel
资金
- National Natural Science Foundation of China (NSFC) [51305295]
- Ministry of Education of China [20130032120006]
In the study, the experiments are performed to determine thickness effect on critical crack tip opening displacement (delta(IC)) of the single-edge tension (SE(T)) specimen with side-groove. The applicability and thickness sensitivity of several fracture toughness estimation procedures are also investigated by the experimental data. Referring to the results by the double clip gauge method, it is found that the critical crack initiation toughness decreases significantly as specimen thickness increases until the thickness-to-width ratio equal to 4, beyond which thickness effect becomes relatively weak. Accordingly, a dimension size is recommended for the fracture toughness testing to take the out-of-plane constraint into account for SE(T) specimen. The further analyses based on the plastic zone size confirm the result as well. (C) 2017 Elsevier Ltd. All rights reserved.
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