Title: The Effect of Principal Stress Rotation in Torsion Shear Test on Sand
Abstract: A series of torsion shear tests were performed on the Santa Monica Beach Sand to investigate the effect of rotation of principal stress axes, which was able to apply independently vertical stresses, confined pressure and torque, respectively. From results of torsion shear tests, it was found that the direction of plastic strain incremental vector at failure coincided with the stress vector in physical stress space and showed a good agreement with nonassociate flow rule in work-space. Also, the directions of strain increment along stress path essentially coincided with the directions of major principal stress increment at small stress levels or in the early stage of tests, but as the stage of stress path approached to failure point, it showed typical isotropic plastic behavior that the directions of strain increment were gradually changed to coincide with the direction of the major principal stress.
Publication Year: 1997
Publication Date: 1997-01-01
Language: en
Type: article
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