Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory
Many numerical methods are carried out to study the nonlinear failure behaviors of the rock; however, the numerical simulation methods for the failed rock are still in the research stage. This paper establishes the damage constitutive equation by combining the bilinear strain softening constitutive...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2018-12-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/2136 |
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| author | Shuchen Li Luchen Zhang Qian Sun Ma Tengfei |
| author_facet | Shuchen Li Luchen Zhang Qian Sun Ma Tengfei |
| author_sort | Shuchen Li |
| collection | DOAJ |
| description | Many numerical methods are carried out to study the nonlinear failure behaviors of the rock; however, the numerical simulation methods for the failed rock are still in the research stage. This paper establishes the damage constitutive equation by combining the bilinear strain softening constitutive model with energy dissipation principles, as well as the energy failure criterion of mesoscopic elements based on the strain energy density theory. When the strain energy stored by an element exceeds a fixed value, the element enters the damage state and the damage degree increases with increasing energy dissipation. Simultaneously, the material properties of the damaged element change until it becomes an element with certain residual strength. As the load increases, the damage degree of an element increases. When the strain energy stored by an element exceeds the established value of the energy criterion, the element is defined to be failed. As the number of failed elements constantly increases, failed elements interconnect and form macrocracks. The rock fracture calculation program on the basis of the preceding algorithm is successfully applied to the fracture simulation process in Brazilian splitting and intermediate crack tensile tests. |
| format | Article |
| id | doaj-art-48fb9bee0e2d4385ad150048fad718f0 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2018-12-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-48fb9bee0e2d4385ad150048fad718f02025-01-03T00:40:24ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932018-12-011347Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density TheoryShuchen LiLuchen ZhangQian SunMa TengfeiMany numerical methods are carried out to study the nonlinear failure behaviors of the rock; however, the numerical simulation methods for the failed rock are still in the research stage. This paper establishes the damage constitutive equation by combining the bilinear strain softening constitutive model with energy dissipation principles, as well as the energy failure criterion of mesoscopic elements based on the strain energy density theory. When the strain energy stored by an element exceeds a fixed value, the element enters the damage state and the damage degree increases with increasing energy dissipation. Simultaneously, the material properties of the damaged element change until it becomes an element with certain residual strength. As the load increases, the damage degree of an element increases. When the strain energy stored by an element exceeds the established value of the energy criterion, the element is defined to be failed. As the number of failed elements constantly increases, failed elements interconnect and form macrocracks. The rock fracture calculation program on the basis of the preceding algorithm is successfully applied to the fracture simulation process in Brazilian splitting and intermediate crack tensile tests.https://www.fracturae.com/index.php/fis/article/view/2136strain energy densityenergy dissipationrock fracturenumerical simulation |
| spellingShingle | Shuchen Li Luchen Zhang Qian Sun Ma Tengfei Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory Fracture and Structural Integrity strain energy density energy dissipation rock fracture numerical simulation |
| title | Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory |
| title_full | Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory |
| title_fullStr | Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory |
| title_full_unstemmed | Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory |
| title_short | Numerical Simulation Method Study of Rock Fracture Based on Strain Energy Density Theory |
| title_sort | numerical simulation method study of rock fracture based on strain energy density theory |
| topic | strain energy density energy dissipation rock fracture numerical simulation |
| url | https://www.fracturae.com/index.php/fis/article/view/2136 |
| work_keys_str_mv | AT shuchenli numericalsimulationmethodstudyofrockfracturebasedonstrainenergydensitytheory AT luchenzhang numericalsimulationmethodstudyofrockfracturebasedonstrainenergydensitytheory AT qiansun numericalsimulationmethodstudyofrockfracturebasedonstrainenergydensitytheory AT matengfei numericalsimulationmethodstudyofrockfracturebasedonstrainenergydensitytheory |