Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics
Joint Authors
Ji, Hongguang
Li, Fei
You, Shuang
Wang, Hao
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-28
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Deep brittle rock exhibits characteristics of rapid stress dropping rate and large stress dropping degree after peak failure.
To simulate the whole process of deformation and failure of the deep brittle rock under load, the Lemaitre strain equivalent theory is modified to make the damaged part of the rock has residual stress.
Based on the damage constitutive model considering residual strength characteristics, a correction factor reflecting stress dropping rate is added, the Weibull distribution is used to describe the inhomogeneity of rock materials, and Drucker–Prager criterion is used to quantitatively describe the influence of stress on damage; a damage constitutive model of deep brittle rock considering stress dropping characteristics is established.
According to the geometric features of the rock stress-strain curve, the theoretical expressions of model parameters are derived.
To verify the rationality of the model, triaxial compression experiments of deep brittle rock under different confining pressures are conducted.
And the influence of model parameters on rock mechanical behaviour is analysed.
The results show that the model reflects the stress dropping characteristics of deep brittle rock and the theoretical curve is in good agreement with the experimental results, which indicates that the proposed constitutive model is scientific and feasible.
American Psychological Association (APA)
Li, Fei& You, Shuang& Ji, Hongguang& Wang, Hao. 2020. Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1124882
Modern Language Association (MLA)
Li, Fei…[et al.]. Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics. Advances in Civil Engineering No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1124882
American Medical Association (AMA)
Li, Fei& You, Shuang& Ji, Hongguang& Wang, Hao. Study of Damage Constitutive Model of Brittle Rocks considering Stress Dropping Characteristics. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1124882
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1124882