Title page for ETD etd-07072004-211420


Type of Document Master's Thesis
Author Boscan, Orlando
Author's Email Address obosca2@lsu.edu
URN etd-07072004-211420
Title Experimental and Computational Modeling of Granular Materials
Degree Master of Science in Civil Engineering (M.S.C.E.)
Department Civil & Environmental Engineering
Advisory Committee
Advisor Name Title
Emir J. Macari Committee Chair
Dante Fratta Committee Member
Khalid A. Alshibli Committee Member
Keywords
  • cubical cell
  • triaxial cell
  • true triaxial
  • cam clay
Date of Defense 2004-06-07
Availability unrestricted
Abstract
4-inch cubical sand specimens were been tested under drained conditions using a wide range of stress paths. The testing was performed by means of a true (cubical) triaxial device that has been conditioned for this study. This testing set-up consisted of a servo-controlled, single-boundary type apparatus, with six flexible membranes that create a center cavity surrounding the soil specimens. This thesis illustrates the functioning of the triaxial device, including detailed descriptions of the device components, sample preparation, and a practical application related to the mechanical characterization of granular materials using critical state soil mechanics. An experimental program, based on the above-described testing device, was created and implemented in order to calibrate a simple constitutive model (Cam Clay Model), and to compare the predictions of this model with the observed mechanical behavior of the selected material under triaxial state of stress. The results of the testing program for this study are typically presented in the Deviatoric Stress vs. Shear Strain Plane, and in the Triaxial Space. These results indicated that the testing program implemented for the calibration of the Cam Clay Model was successful in reproducing the general mechanical behavior of the granular material tested herein. General conclusions and recommendations for further research are included in at the end of this paper.
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