{"title":"An internal-strain loading approach for quasi-static fracturing in brittle rocks via the grain-based model","authors":"","doi":"10.1016/j.enganabound.2024.105996","DOIUrl":null,"url":null,"abstract":"<div><div>The grain-based model is used to study the time-independent and time-dependent behavior in damage evolution and fracture patterns of brittle rocks. The standard loading approach (i.e., the model is loaded by applying constant velocities at boundaries of the model based on the test procedure) is the primary loading approach for quasi-static simulation in the grain-based model, but the computational efficiency of this approach is relatively low. We developed herein the internal-strain loading approach, a more efficient loading approach, for simulating the mechanical behavior of brittle rocks. The internal-strain loading approach was embedded into the three-dimensional discrete element grain-based model (3DEC-GBM). The internal-strain loading approach was compared to the standard loading approach using triaxial compression, direct tensile, and direct shear simulations. The results showed that the internal-strain loading approach was able to accurately reproduce both the deformation behavior and strength of the laboratory experiment. Compared with the standard loading approach, where the axial velocity of two plates was 0.0025 m s<sup>−1</sup> in the compression simulation, the internal-strain loading approach can reduce the model run times by up to ten times. We conclude that the proposed internal-strain loading approach is a powerful tool that can improve the computational efficiency of the grain-based model.</div></div>","PeriodicalId":51039,"journal":{"name":"Engineering Analysis with Boundary Elements","volume":null,"pages":null},"PeriodicalIF":4.2000,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Engineering Analysis with Boundary Elements","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0955799724004697","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The grain-based model is used to study the time-independent and time-dependent behavior in damage evolution and fracture patterns of brittle rocks. The standard loading approach (i.e., the model is loaded by applying constant velocities at boundaries of the model based on the test procedure) is the primary loading approach for quasi-static simulation in the grain-based model, but the computational efficiency of this approach is relatively low. We developed herein the internal-strain loading approach, a more efficient loading approach, for simulating the mechanical behavior of brittle rocks. The internal-strain loading approach was embedded into the three-dimensional discrete element grain-based model (3DEC-GBM). The internal-strain loading approach was compared to the standard loading approach using triaxial compression, direct tensile, and direct shear simulations. The results showed that the internal-strain loading approach was able to accurately reproduce both the deformation behavior and strength of the laboratory experiment. Compared with the standard loading approach, where the axial velocity of two plates was 0.0025 m s−1 in the compression simulation, the internal-strain loading approach can reduce the model run times by up to ten times. We conclude that the proposed internal-strain loading approach is a powerful tool that can improve the computational efficiency of the grain-based model.
期刊介绍:
This journal is specifically dedicated to the dissemination of the latest developments of new engineering analysis techniques using boundary elements and other mesh reduction methods.
Boundary element (BEM) and mesh reduction methods (MRM) are very active areas of research with the techniques being applied to solve increasingly complex problems. The journal stresses the importance of these applications as well as their computational aspects, reliability and robustness.
The main criteria for publication will be the originality of the work being reported, its potential usefulness and applications of the methods to new fields.
In addition to regular issues, the journal publishes a series of special issues dealing with specific areas of current research.
The journal has, for many years, provided a channel of communication between academics and industrial researchers working in mesh reduction methods
Fields Covered:
• Boundary Element Methods (BEM)
• Mesh Reduction Methods (MRM)
• Meshless Methods
• Integral Equations
• Applications of BEM/MRM in Engineering
• Numerical Methods related to BEM/MRM
• Computational Techniques
• Combination of Different Methods
• Advanced Formulations.