Mechanical behavior of granular materials and particle breakage at high stress
- Laboratoire de Mecanique Sols, Stricture & Materiux, Ecole Centrale Paris (France)
This study presents the results of an extensive experimental investigation of the behavior of granular materials at high stress. The many types of experiments performed are drained triaxial compression tests with an overall confining pressure range of 0.5 to 60 MPa and one dimensional compression tests up to 75 MPa axial stress level. Two grain size distributions were investigated using drained triaxial compression tests and one dimensional tests. As confining pressure continues to increase, the volumetric and principal strains to failure increase. The relationships between the deviatoric stress ({sigma}{sub 1}-{sigma}{sub 3}) and the principal strain({epsilon}{sub 1}), the void ratio(e) and the mean normal stress(p), the volumetric strain ({epsilon}{sub v}) and the principal strain({epsilon}{sub 1}), and the deviatoric stress ({sigma}{sub 1}-{sigma}{sub 3}) and the mean normal stress (p) for triaxial tests were observed. For one dimensional tests, this research examined the behavior of materials with respect to the axial stress({sigma}{sub z}), and the axial strain ({epsilon}{sub z}), the void ratio (e) and the axial stress({sigma}{sub z}), and the dependence on time. The critical state was also considered. The grain size distribution before and after the test was analyzed systematically. The amount of particle crushing in granular materials depends on grain size distribution, particle shape, state of effective stress, effective stress-strain path, void ratio, particle hardness and the presence or absence of water.
- OSTI ID:
- 175262
- Report Number(s):
- CONF-950686--
- Country of Publication:
- United States
- Language:
- English
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