期刊
ENGINEERING FAILURE ANALYSIS
卷 58, 期 -, 页码 267-280出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2015.09.007
关键词
Fracture mechanics; Pre-stressed concrete sleeper; Stress intensity factor; Crack-to-depth ratios
资金
- factory of pre-stressed concrete sleeper B70 production Brace Concrete Industries Company
This paper presents an investigation on pre-stressed concrete sleepers based on the principles of fracture mechanics in concrete material. To evaluate fracture mechanics parameters pre-stressed concrete sleepers with different initiation crack length varying between 0 mm and 45 mm increasing by 5 mm steps are used. A three-point bending loading condition is considered. Finite element software is employed to model the sleepers and to calculate the parameters of fracture mechanics such as K-Ic and crack growth. Finally, in this study for validation, load-displacement diagram of 5 experimental samples is compared with numerical model of finite elements for validation of model. The paper shows that an expansion in crack instability follows from increasing crack-to-depth ratio, initial toughness, the crack stability and crack unstable toughness, the crack instability expansion begins. The paper also shows a good agreement between the numerical and experimental results via comparing the results of the 5 samples with the numerical model. (C) 2015 Elsevier Ltd. All rights reserved.
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