Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading
The nature of the fracture and fragmentation processes in concrete medium under blast loading is the transformation of the medium from continuum to discontinuity. Coupled with the significant rate correlation of concrete medium, its mechanical behavior presents a high degree of complexity. When tack...
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MDPI AG
2023-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/14/8533 |
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| author | Zheng Liu Jun Liu Xianqi Xie Mengyang Zhen Yue Wang Chen Ou Haowen Zheng |
| author_facet | Zheng Liu Jun Liu Xianqi Xie Mengyang Zhen Yue Wang Chen Ou Haowen Zheng |
| author_sort | Zheng Liu |
| collection | DOAJ |
| description | The nature of the fracture and fragmentation processes in concrete medium under blast loading is the transformation of the medium from continuum to discontinuity. Coupled with the significant rate correlation of concrete medium, its mechanical behavior presents a high degree of complexity. When tackling this problem, the finite element method (FEM) frequently encounters problems such as grid distortion and even negative volume, whereas the material point method (MPM) can efficiently avoid these problems. Furthermore, the original Holmquist-Johnson-Cook (HJC) model does not take the segmented characteristics of the calculation function for the dynamic increasing factor into consideration. As a result, in this article, first, the calculation function for the dynamic increasing factor in the HJC model was modified by the Split-Hopkinson Pressure Bar (SHPB) experiment, and an improved HJC model was proposed; second, an MPM simulation program was developed, and the improved HJC concrete model was embedded into the simulation program; and finally, the simulation program was verified by numerical examples, and the results show that the developed simulation program can better simulate the fracture and fragmentation process of the concrete medium under blast loading, especially the pulverization characteristics of the medium in the near zone of the load. |
| first_indexed | 2024-03-11T01:19:54Z |
| format | Article |
| id | doaj.art-afbbf3933eb04798974030a46faa087e |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T01:19:54Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-afbbf3933eb04798974030a46faa087e2023-11-18T18:14:27ZengMDPI AGApplied Sciences2076-34172023-07-011314853310.3390/app13148533Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast LoadingZheng Liu0Jun Liu1Xianqi Xie2Mengyang Zhen3Yue Wang4Chen Ou5Haowen Zheng6College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaCollege of Civil and Transportation Engineering, Hohai University, Nanjing 210024, ChinaThe nature of the fracture and fragmentation processes in concrete medium under blast loading is the transformation of the medium from continuum to discontinuity. Coupled with the significant rate correlation of concrete medium, its mechanical behavior presents a high degree of complexity. When tackling this problem, the finite element method (FEM) frequently encounters problems such as grid distortion and even negative volume, whereas the material point method (MPM) can efficiently avoid these problems. Furthermore, the original Holmquist-Johnson-Cook (HJC) model does not take the segmented characteristics of the calculation function for the dynamic increasing factor into consideration. As a result, in this article, first, the calculation function for the dynamic increasing factor in the HJC model was modified by the Split-Hopkinson Pressure Bar (SHPB) experiment, and an improved HJC model was proposed; second, an MPM simulation program was developed, and the improved HJC concrete model was embedded into the simulation program; and finally, the simulation program was verified by numerical examples, and the results show that the developed simulation program can better simulate the fracture and fragmentation process of the concrete medium under blast loading, especially the pulverization characteristics of the medium in the near zone of the load.https://www.mdpi.com/2076-3417/13/14/8533blast loadingconcrete mediumrate sensitivityimproved HJC modelMPM |
| spellingShingle | Zheng Liu Jun Liu Xianqi Xie Mengyang Zhen Yue Wang Chen Ou Haowen Zheng Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading Applied Sciences blast loading concrete medium rate sensitivity improved HJC model MPM |
| title | Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading |
| title_full | Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading |
| title_fullStr | Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading |
| title_full_unstemmed | Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading |
| title_short | Material Point Simulation Method for Concrete Medium Fracture and Fragmentation under Blast Loading |
| title_sort | material point simulation method for concrete medium fracture and fragmentation under blast loading |
| topic | blast loading concrete medium rate sensitivity improved HJC model MPM |
| url | https://www.mdpi.com/2076-3417/13/14/8533 |
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