Discrete element modelling of creep of asphalt mixtures
Creep tests on asphalt mixtures have been undertaken under four stress levels in the laboratory while the Discrete Element Model (DEM) has been used to simulate the laboratory tests. A modified Burger’s model has been used to represent the time-dependent behaviour of an asphalt mixture by adding tim...
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| Format: | Article |
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Taylor & Francis
2015
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| Online Access: | https://eprints.nottingham.ac.uk/33341/ |
| _version_ | 1848794609002479616 |
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| author | Cai, Wei McDowell, Glenn R. Airey, Gordon de Bono, John P. |
| author_facet | Cai, Wei McDowell, Glenn R. Airey, Gordon de Bono, John P. |
| author_sort | Cai, Wei |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Creep tests on asphalt mixtures have been undertaken under four stress levels in the laboratory while the Discrete Element Model (DEM) has been used to simulate the laboratory tests. A modified Burger’s model has been used to represent the time-dependent behaviour of an asphalt mixture by adding time-dependent moment and torsional resistance at contacts. Parameters were chosen to give the correct stress-strain response for constant strain rate tests in Cai et al. (2013) . The stress-strain response for the laboratory creep tests and the simulations were recorded. The DEM results show reasonable agreement with the experiments. The creep simulation results proved to be dependent on both bond strength variability and positions of the particles. Bond breakage was recorded during the simulations and used to investigate the micro-mechanical deformation behaviour of the asphalt mixtures. An approach based on dimensional analysis is also presented in this paper to reduce the computational time during the creep simulation, and this analysis is also a new contribution. |
| first_indexed | 2025-11-14T19:18:54Z |
| format | Article |
| id | nottingham-33341 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:18:54Z |
| publishDate | 2015 |
| publisher | Taylor & Francis |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-333412020-05-04T17:02:07Z https://eprints.nottingham.ac.uk/33341/ Discrete element modelling of creep of asphalt mixtures Cai, Wei McDowell, Glenn R. Airey, Gordon de Bono, John P. Creep tests on asphalt mixtures have been undertaken under four stress levels in the laboratory while the Discrete Element Model (DEM) has been used to simulate the laboratory tests. A modified Burger’s model has been used to represent the time-dependent behaviour of an asphalt mixture by adding time-dependent moment and torsional resistance at contacts. Parameters were chosen to give the correct stress-strain response for constant strain rate tests in Cai et al. (2013) . The stress-strain response for the laboratory creep tests and the simulations were recorded. The DEM results show reasonable agreement with the experiments. The creep simulation results proved to be dependent on both bond strength variability and positions of the particles. Bond breakage was recorded during the simulations and used to investigate the micro-mechanical deformation behaviour of the asphalt mixtures. An approach based on dimensional analysis is also presented in this paper to reduce the computational time during the creep simulation, and this analysis is also a new contribution. Taylor & Francis 2015-02-24 Article PeerReviewed Cai, Wei, McDowell, Glenn R., Airey, Gordon and de Bono, John P. (2015) Discrete element modelling of creep of asphalt mixtures. Geomechanics and Geoengineering, 11 (1). pp. 64-72. ISSN 1748-6033 discrete element modelling asphalt creep fracture http://www.tandfonline.com/doi/full/10.1080/17486025.2015.1006689 doi:10.1080/17486025.2015.1006689 doi:10.1080/17486025.2015.1006689 |
| spellingShingle | discrete element modelling asphalt creep fracture Cai, Wei McDowell, Glenn R. Airey, Gordon de Bono, John P. Discrete element modelling of creep of asphalt mixtures |
| title | Discrete element modelling of creep of asphalt mixtures |
| title_full | Discrete element modelling of creep of asphalt mixtures |
| title_fullStr | Discrete element modelling of creep of asphalt mixtures |
| title_full_unstemmed | Discrete element modelling of creep of asphalt mixtures |
| title_short | Discrete element modelling of creep of asphalt mixtures |
| title_sort | discrete element modelling of creep of asphalt mixtures |
| topic | discrete element modelling asphalt creep fracture |
| url | https://eprints.nottingham.ac.uk/33341/ https://eprints.nottingham.ac.uk/33341/ https://eprints.nottingham.ac.uk/33341/ |