Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure
Rock heterogeneity (such as mineral inclusions, micro-cracks, micro-voids and other microstructures) significantly affects its nonlinear mechanical behavior and failure process. This paper utilizes the Fast Fourier transform-based(FFT) numerical method which does not require meshing of complex micro...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2022-08-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/cn/article/doi/10.19606/j.cnki.jmst.2022.04.007 |
| _version_ | 1828213580882771968 |
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| author | Li Mingyao Peng Lei Zuo Jianping Wang Zhimin Li Shaojin Xue Xiren |
| author_facet | Li Mingyao Peng Lei Zuo Jianping Wang Zhimin Li Shaojin Xue Xiren |
| author_sort | Li Mingyao |
| collection | DOAJ |
| description | Rock heterogeneity (such as mineral inclusions, micro-cracks, micro-voids and other microstructures) significantly affects its nonlinear mechanical behavior and failure process. This paper utilizes the Fast Fourier transform-based(FFT) numerical method which does not require meshing of complex microstructure but directly obtains the microstructure of heterogeneous materials through the pixels of the image. In addition, the method can be naturally combined with digital image processing (DIP). An actual-microstructure-based FFT method is thereby developed to simulate the elastoplastic behavior of the heterogeneous rocks under external load. The influence of microstructure on the nonlinear behavior is discussed as well as the internal relationship between the microstructure and the macroscopic mechanical properties. The results show that the real-microstructure-based FFT method can well predict the nonlinear behavior before and after the peak strength of the rocks under different depths and confining pressures. The shape, size and distribution of microstructure directly determine the distribution of stress field in clay rock. The actual-microstructure-based FFT method proposed in this paper can reasonably consider the rock heterogeneity, and provides an important tool for studying the influence of the rock microstructure characteristics on the nonlinear mechanical behavior. |
| first_indexed | 2024-04-12T14:52:33Z |
| format | Article |
| id | doaj.art-656fae6544f24c5897dbe7736e86b3f9 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-12T14:52:33Z |
| publishDate | 2022-08-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-656fae6544f24c5897dbe7736e86b3f92022-12-22T03:28:23ZengEmergency Management Press矿业科学学报2096-21932022-08-017445646610.19606/j.cnki.jmst.2022.04.00720220407Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructureLi Mingyao0Peng Lei1Zuo Jianping2Wang Zhimin3Li Shaojin4Xue Xiren5School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaRock heterogeneity (such as mineral inclusions, micro-cracks, micro-voids and other microstructures) significantly affects its nonlinear mechanical behavior and failure process. This paper utilizes the Fast Fourier transform-based(FFT) numerical method which does not require meshing of complex microstructure but directly obtains the microstructure of heterogeneous materials through the pixels of the image. In addition, the method can be naturally combined with digital image processing (DIP). An actual-microstructure-based FFT method is thereby developed to simulate the elastoplastic behavior of the heterogeneous rocks under external load. The influence of microstructure on the nonlinear behavior is discussed as well as the internal relationship between the microstructure and the macroscopic mechanical properties. The results show that the real-microstructure-based FFT method can well predict the nonlinear behavior before and after the peak strength of the rocks under different depths and confining pressures. The shape, size and distribution of microstructure directly determine the distribution of stress field in clay rock. The actual-microstructure-based FFT method proposed in this paper can reasonably consider the rock heterogeneity, and provides an important tool for studying the influence of the rock microstructure characteristics on the nonlinear mechanical behavior.http://kykxxb.cumtb.edu.cn/cn/article/doi/10.19606/j.cnki.jmst.2022.04.007fast fourier transforms (fft) methoddigital image processrocksmicromechanicsheterogeneity |
| spellingShingle | Li Mingyao Peng Lei Zuo Jianping Wang Zhimin Li Shaojin Xue Xiren Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure 矿业科学学报 fast fourier transforms (fft) method digital image process rocks micromechanics heterogeneity |
| title | Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure |
| title_full | Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure |
| title_fullStr | Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure |
| title_full_unstemmed | Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure |
| title_short | Study of the nonlinear mechanical behavior of rock materials using the FFT numerical method based on the actual mesostructure |
| title_sort | study of the nonlinear mechanical behavior of rock materials using the fft numerical method based on the actual mesostructure |
| topic | fast fourier transforms (fft) method digital image process rocks micromechanics heterogeneity |
| url | http://kykxxb.cumtb.edu.cn/cn/article/doi/10.19606/j.cnki.jmst.2022.04.007 |
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