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DC Field | Value | Language |
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dc.contributor.advisor | Pietruszczak, S. | - |
dc.contributor.advisor | Guo, P. | - |
dc.contributor.author | Azami, Alireza | - |
dc.date.accessioned | 2015-05-13T20:32:22Z | - |
dc.date.available | 2015-05-13T20:32:22Z | - |
dc.date.issued | 2009-12 | - |
dc.identifier.uri | http://hdl.handle.net/11375/17298 | - |
dc.description.abstract | <p>The subject of this thesis is the mechanical response of inherently anisotropic granular materials. The study comprises both the experimental and numerical aspects and provides a rigorous methodology for the solution of geotechnical problems involving anisotropic frictional materials.</p> <p>The experimental investigation has been carried out at both the material and structural levels. The material tests involved a series of direct shear, triaxial and hollow cylinder experiments on crushed limestone sand, whose mechanical characteristics are strongly affected by the orientation of the sample. In addition, a scaled foundation setup was designed and a series of experimental tests was carried out to examine the effects of anisotropy on bearing capacity.</p> <p>The numerical part of this work was associated with development and implementation of a constitutive framework that describes the mechanical response of transversely isotropic frictional materials. The framework is based on elasto-plasticity and accounts for the effects of strain localization and inherent anisotropy of both the deformation and strength characteristics. An implicit scheme was proposed for identification of material parameters/functions, which incorporates predictions based on critical plane analysis. As a part of constitutive modeling, a suitable numerical algorithm was also developed to integrate the constitutive equations.</p> <p>The constitutive framework has been implemented in a commercial FE package (ABAQUS). A series of numerical simulations were carried out focused on the assessment of the bearing capacity of a shallow foundation in transversely isotropic granular medium. The results of numerical simulations have been compared with the experimental data. A parametric study was also carried out aimed at examining the influence of various simplifications in the mathematical framework on its predictive abilities.</p> | en_US |
dc.language.iso | en | en_US |
dc.subject | engineering, mechanical response, granular | en_US |
dc.title | On the mechanical response of anisotropic granular materials | en_US |
dc.contributor.department | Engineering | en_US |
dc.description.degreetype | Thesis | en_US |
dc.description.degree | Doctor of Philosophy (PhD) | en_US |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Azami_Alireza_2009Dec_PhD.pdf | 5.22 MB | Adobe PDF | View/Open |
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