Damage Constitutive Model of Microcrack Rock under Tension
Joint Authors
He, Manchao
Niu, Huiya
Zhang, Xingyu
Tao, Zhigang
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-11-19
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
To investigate the tensile properties of brittle rock with microdamage, an indirect tensile test was conducted.
High-speed image acquisition and acoustic emission (AE) were applied to record the process.
After the tests, the images were analysed using the digital image correlation (DIC) method to obtain the stress and strain development of the rock under tension.
The damage constitutive model was also developed in this study.
Based on known and assumed statistical distributions for microcracks and the theory of fracture and statistical damage, the mechanical properties and failure mechanisms of brittle rock under tension were analysed.
The basic statistical parameters of the main cracks in the elements were described, and the damage variable was defined to develop the effective modulus.
A constitutive model for microdamage brittle rock-like materials was established based on the effective modulus.
Additionally, to describe the crack propagation, a random-direction crack under tension was analysed to calculate the crack-tip stress intensity factor.
After applying the basic parameters of the sandstone to the analytical model, the results showed that the analytical model agreed with the experimental results.
American Psychological Association (APA)
Niu, Huiya& Zhang, Xingyu& Tao, Zhigang& He, Manchao. 2020. Damage Constitutive Model of Microcrack Rock under Tension. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1123579
Modern Language Association (MLA)
Niu, Huiya…[et al.]. Damage Constitutive Model of Microcrack Rock under Tension. Advances in Civil Engineering No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1123579
American Medical Association (AMA)
Niu, Huiya& Zhang, Xingyu& Tao, Zhigang& He, Manchao. Damage Constitutive Model of Microcrack Rock under Tension. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1123579
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1123579