Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample
To examine the macro-and meso-mechanical behaviors and crack propagation mode of the prefabricated and fractured rock sample under biaxial compression, the particle flow code (PFC) is first used to study the effect of the micro-parameters of the parallel bond model on the macro-parameters. Combined...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Hydrogeology & Engineering Geology
2021-07-01
|
| Series: | Shuiwen dizhi gongcheng dizhi |
| Subjects: | |
| Online Access: | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202010044 |
| _version_ | 1811169559461232640 |
|---|---|
| author | Xingchen WANG Zhiliang WANG Youpeng HUANG Shuailong JIA |
| author_facet | Xingchen WANG Zhiliang WANG Youpeng HUANG Shuailong JIA |
| author_sort | Xingchen WANG |
| collection | DOAJ |
| description | To examine the macro-and meso-mechanical behaviors and crack propagation mode of the prefabricated and fractured rock sample under biaxial compression, the particle flow code (PFC) is first used to study the effect of the micro-parameters of the parallel bond model on the macro-parameters. Combined with the conventional triaxial compression test of intact granite, the meso-parameters are calibrated. The mechanical properties of the sample with prefabricated double fractures (upper fracture ① and lower fracture ②) under confining pressure are simulated with the set of parameters. The results show that the PFC code and the calibrated parameters can better simulate the failure of the complete samples. As the confining pressure increases, the peak strength and elastic modulus of the double-fractured rock sample increase. When the angle α2 between the lower fracture ② and the horizontal is 90°, both of them reach the maximum values. Under different α2, the simulated crack evolution of each rock sample goes through three stages of crack initiation, development and stabilization. With the decreasing confining pressure and the increasing axial stress, the damage of the force chains between particles becomes more severe. Due to the difference in the concentration and distribution of the tensile force chains, the cracks along the length of the horizontal fracture propagate along the axial direction, and the penetration of the two fractures presents different ways. |
| first_indexed | 2024-04-10T16:45:38Z |
| format | Article |
| id | doaj.art-94d751e44b4b4614928b350a05ae5ce6 |
| institution | Directory Open Access Journal |
| issn | 1000-3665 |
| language | zho |
| last_indexed | 2024-04-10T16:45:38Z |
| publishDate | 2021-07-01 |
| publisher | Editorial Office of Hydrogeology & Engineering Geology |
| record_format | Article |
| series | Shuiwen dizhi gongcheng dizhi |
| spelling | doaj.art-94d751e44b4b4614928b350a05ae5ce62023-02-08T01:29:16ZzhoEditorial Office of Hydrogeology & Engineering GeologyShuiwen dizhi gongcheng dizhi1000-36652021-07-01484869210.16030/j.cnki.issn.1000-3665.202010044202010044Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sampleXingchen WANG0Zhiliang WANG1Youpeng HUANG2Shuailong JIA3School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui 230009, ChinaSchool of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui 230009, ChinaSchool of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui 230009, ChinaSchool of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei, Anhui 230009, ChinaTo examine the macro-and meso-mechanical behaviors and crack propagation mode of the prefabricated and fractured rock sample under biaxial compression, the particle flow code (PFC) is first used to study the effect of the micro-parameters of the parallel bond model on the macro-parameters. Combined with the conventional triaxial compression test of intact granite, the meso-parameters are calibrated. The mechanical properties of the sample with prefabricated double fractures (upper fracture ① and lower fracture ②) under confining pressure are simulated with the set of parameters. The results show that the PFC code and the calibrated parameters can better simulate the failure of the complete samples. As the confining pressure increases, the peak strength and elastic modulus of the double-fractured rock sample increase. When the angle α2 between the lower fracture ② and the horizontal is 90°, both of them reach the maximum values. Under different α2, the simulated crack evolution of each rock sample goes through three stages of crack initiation, development and stabilization. With the decreasing confining pressure and the increasing axial stress, the damage of the force chains between particles becomes more severe. Due to the difference in the concentration and distribution of the tensile force chains, the cracks along the length of the horizontal fracture propagate along the axial direction, and the penetration of the two fractures presents different ways.https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202010044pfcparallel bonding modelparameter calibrationdouble-fissure rock samplecrack evolution |
| spellingShingle | Xingchen WANG Zhiliang WANG Youpeng HUANG Shuailong JIA Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample Shuiwen dizhi gongcheng dizhi pfc parallel bonding model parameter calibration double-fissure rock sample crack evolution |
| title | Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample |
| title_full | Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample |
| title_fullStr | Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample |
| title_full_unstemmed | Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample |
| title_short | Particle flow simulation of macro- and meso-mechanical behavior of the prefabricated fractured rock sample |
| title_sort | particle flow simulation of macro and meso mechanical behavior of the prefabricated fractured rock sample |
| topic | pfc parallel bonding model parameter calibration double-fissure rock sample crack evolution |
| url | https://www.swdzgcdz.com/en/article/doi/10.16030/j.cnki.issn.1000-3665.202010044 |
| work_keys_str_mv | AT xingchenwang particleflowsimulationofmacroandmesomechanicalbehavioroftheprefabricatedfracturedrocksample AT zhiliangwang particleflowsimulationofmacroandmesomechanicalbehavioroftheprefabricatedfracturedrocksample AT youpenghuang particleflowsimulationofmacroandmesomechanicalbehavioroftheprefabricatedfracturedrocksample AT shuailongjia particleflowsimulationofmacroandmesomechanicalbehavioroftheprefabricatedfracturedrocksample |