Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM)
This paper investigates the failure processes of recycled aggregate concrete by a model test and numerical simulations. A micromechanical numerical modeling approach to simulate the progressive cracking behavior of the modeled recycled aggregate concrete, considering its actual meso-structures, is e...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/19/4329 |
| _version_ | 1797552323820519424 |
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| author | Xin Tan Zhengbo Hu Wengui Li Suhua Zhou Tenglong Li |
| author_facet | Xin Tan Zhengbo Hu Wengui Li Suhua Zhou Tenglong Li |
| author_sort | Xin Tan |
| collection | DOAJ |
| description | This paper investigates the failure processes of recycled aggregate concrete by a model test and numerical simulations. A micromechanical numerical modeling approach to simulate the progressive cracking behavior of the modeled recycled aggregate concrete, considering its actual meso-structures, is established based on the discrete element method (DEM). The determination procedure of contact microparameters is analyzed, and a series of microscopic contact parameters for different components of modeled recycled aggregate concrete (MRAC) is calibrated using nanoindentation test results. The complete stress–strain curves, cracking process, and failure pattern of the numerical model are verified by the experimental results, proving their accuracy and validation. The initiation, growth, interaction, coalescence of microcracks, and subsequent macroscopic failure of the MRAC specimen are captured through DEM numerical simulations and compared with digital image correlation (DIC) results. The typical cracking modes controlled by meso-structures of MRAC are concluded according to numerical observations. A parameter study indicates the dominant influence of the macroscopic mechanical behaviors from the shear strength of the interfacial transition zones (ITZs). |
| first_indexed | 2024-03-10T15:59:21Z |
| format | Article |
| id | doaj.art-f9e5a8f4c17a474a94a4fa1657c76dc0 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T15:59:21Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-f9e5a8f4c17a474a94a4fa1657c76dc02023-11-20T15:28:52ZengMDPI AGMaterials1996-19442020-09-011319432910.3390/ma13194329Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM)Xin Tan0Zhengbo Hu1Wengui Li2Suhua Zhou3Tenglong Li4College of Civil Engineering, Hunan University, Changsha 410082, ChinaCollege of Civil Engineering, Hunan University, Changsha 410082, ChinaSchool of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, AustraliaCollege of Civil Engineering, Hunan University, Changsha 410082, ChinaCollege of Civil Engineering, Hunan University, Changsha 410082, ChinaThis paper investigates the failure processes of recycled aggregate concrete by a model test and numerical simulations. A micromechanical numerical modeling approach to simulate the progressive cracking behavior of the modeled recycled aggregate concrete, considering its actual meso-structures, is established based on the discrete element method (DEM). The determination procedure of contact microparameters is analyzed, and a series of microscopic contact parameters for different components of modeled recycled aggregate concrete (MRAC) is calibrated using nanoindentation test results. The complete stress–strain curves, cracking process, and failure pattern of the numerical model are verified by the experimental results, proving their accuracy and validation. The initiation, growth, interaction, coalescence of microcracks, and subsequent macroscopic failure of the MRAC specimen are captured through DEM numerical simulations and compared with digital image correlation (DIC) results. The typical cracking modes controlled by meso-structures of MRAC are concluded according to numerical observations. A parameter study indicates the dominant influence of the macroscopic mechanical behaviors from the shear strength of the interfacial transition zones (ITZs).https://www.mdpi.com/1996-1944/13/19/4329discrete element methoddigital image processingrecycled aggregate concretemeso-structuremicrocrack |
| spellingShingle | Xin Tan Zhengbo Hu Wengui Li Suhua Zhou Tenglong Li Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM) Materials discrete element method digital image processing recycled aggregate concrete meso-structure microcrack |
| title | Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM) |
| title_full | Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM) |
| title_fullStr | Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM) |
| title_full_unstemmed | Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM) |
| title_short | Micromechanical Numerical Modelling on Compressive Failure of Recycled Concrete using Discrete Element Method (DEM) |
| title_sort | micromechanical numerical modelling on compressive failure of recycled concrete using discrete element method dem |
| topic | discrete element method digital image processing recycled aggregate concrete meso-structure microcrack |
| url | https://www.mdpi.com/1996-1944/13/19/4329 |
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