Numerical Study of Rock Fragmentation Process and Acoustic Emission by FDEM Based on Heterogeneous Model
Joint Authors
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-07-23
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Rock has the characteristics of natural heterogeneity and discontinuity.
Its failure phenomenon induced by external force involves complex processes, including the microcrack initiation, propagation, coalescence, and the macrocrack formation.
In this study, the Weibull random distribution based on the rock microstructure characteristics is introduced into the combined finite-discrete element method (FDEM) to establish the heterogeneous rock model, and the mechanical response and damage evolution of rock samples in uniaxial compression test are simulated.
The results show that FDEM simulation with loaded heterogeneous rock model can reflect the progressive development of rock damage, fracture, and acoustic emission (AE) activity in real rock well.
Meanwhile, the statistical analysis indicates that the number and energy evolution of AE events with different fracture modes in the model are consistent with the macroscopic failure mode of rock.
The change of b-value also agrees with the increasing trend of high-energy events in the loading process.
This method provides a new tool for the analysis of rock damage and fracture evolution.
American Psychological Association (APA)
Liu, Qi& Deng, Penghai. 2020. Numerical Study of Rock Fragmentation Process and Acoustic Emission by FDEM Based on Heterogeneous Model. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1193700
Modern Language Association (MLA)
Liu, Qi& Deng, Penghai. Numerical Study of Rock Fragmentation Process and Acoustic Emission by FDEM Based on Heterogeneous Model. Mathematical Problems in Engineering No. 2020 (2020), pp.1-13.
https://search.emarefa.net/detail/BIM-1193700
American Medical Association (AMA)
Liu, Qi& Deng, Penghai. Numerical Study of Rock Fragmentation Process and Acoustic Emission by FDEM Based on Heterogeneous Model. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-13.
https://search.emarefa.net/detail/BIM-1193700
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1193700