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Nonlinear Dynamic Constitutive Model of Frozen Sandstone Based on Weibull Distribution
Joint Authors
Su, Hongming
Chen, Shiguan
Qin, Yue
Wang, Lei
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-06-29
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
To obtain the dynamic mechanical properties of frozen sandstone at different temperatures (i.e., 20°C, −10°C, −20°C, and −30°C), dynamic uniaxial compression tests of saturated sandstone are conducted using a split-Hopkinson pressure bar.
The experimental results demonstrated that the brittleness of the saturated sandstone increased and its plasticity weakened with a decrease in temperature.
The peak strength and dynamic elastic modulus of the sandstone were positively correlated with its strain rate.
The peak stress was most sensitive to the strain rate at −10°C, and the elastic modulus was most sensitive to the strain rate at −30°C.
According to the evident segmentation characteristics of the obtained stress-strain curve, a viscoelastic dynamic constitutive model considering the strain rate effect and temperature effect is developed; this model combines a nonlinear (or linear) body and a Maxwell body in parallel with a damage body.
The applicability of the constitutive model is also verified using experimental data.
The fitting results were demonstrated to be in good agreement with the experimental results.
Furthermore, the fitting results serve as reference for the study of the constitutive model of weakly cemented soft rock and the construction of roadway freezing methods.
American Psychological Association (APA)
Wang, Lei& Su, Hongming& Chen, Shiguan& Qin, Yue. 2020. Nonlinear Dynamic Constitutive Model of Frozen Sandstone Based on Weibull Distribution. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1122238
Modern Language Association (MLA)
Wang, Lei…[et al.]. Nonlinear Dynamic Constitutive Model of Frozen Sandstone Based on Weibull Distribution. Advances in Civil Engineering No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1122238
American Medical Association (AMA)
Wang, Lei& Su, Hongming& Chen, Shiguan& Qin, Yue. Nonlinear Dynamic Constitutive Model of Frozen Sandstone Based on Weibull Distribution. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1122238
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122238