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https://scholarbank.nus.edu.sg/handle/10635/138662
DC Field | Value | |
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dc.title | LOCALIZING GRADIENT DAMAGE MODELS FOR THE FRACTURE OF QUASI-BRITTLE MATERIALS | |
dc.contributor.author | SUN GANG | |
dc.date.accessioned | 2018-01-31T18:00:50Z | |
dc.date.available | 2018-01-31T18:00:50Z | |
dc.date.issued | 2017-07-07 | |
dc.identifier.citation | SUN GANG (2017-07-07). LOCALIZING GRADIENT DAMAGE MODELS FOR THE FRACTURE OF QUASI-BRITTLE MATERIALS. ScholarBank@NUS Repository. | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/138662 | |
dc.description.abstract | This thesis focuses on the development of an improved gradient enhancement that fully regularizes the strain softening behavior of continuum damage models, i.e. a mesh independent structural response, with the development of localized damage profiles resembling macroscopic cracks at failure. The overall strategy is to first consider an idealized problem, where a higher-order microforce balance governing the damage process is recovered through a novel homogenization framework. Motivated by the insights obtained from the micromechanical analysis, a localizing gradient enhancement is developed from the generalized micromorphic framework, which is shown to avoid the anomalies associated with the conventional nonlocal approach. Finally, an isotropic damage model incorporating a newly proposed equivalent strain measure, regularized with the localizing gradient enhancement, is adopted for the mixed-mode fracture of concrete。 | |
dc.language.iso | en | |
dc.subject | Gradient enhancement, Damage mechanics, Quasi-brittle materials, Fracture | |
dc.type | Thesis | |
dc.contributor.department | CIVIL & ENVIRONMENTAL ENGINEERING | |
dc.contributor.supervisor | POH LEONG HIEN | |
dc.description.degree | Ph.D | |
dc.description.degreeconferred | DOCTOR OF PHILOSOPHY | |
Appears in Collections: | Ph.D Theses (Open) |
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SUNGang.pdf | 7.28 MB | Adobe PDF | OPEN | None | View/Download |
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