Experimental studies on the influence of intermediate principal stress and inclination on the mechanical behaviour of angular sands

Kandasami, Ramesh K and Murthy, Tejas G (2015) Experimental studies on the influence of intermediate principal stress and inclination on the mechanical behaviour of angular sands. In: GRANULAR MATTER, 17 (2). pp. 217-230.

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Abstract

A comprehensive experimental study has been made on angular sand to investigate various aspects of mechanical behavior. A hollow cylinder torsion testing apparatus is used in this program to apply a range of stress conditions on this angular quartzitic fine sand under monotonic drained shear. The effect of the magnitude and inclination of the principal stresses on an element of sand is studied through these experiments. This magnitude and inclination of the principal stresses are presented as an ``ensemble measure of fabric in sands''. This ensemble measure of fabric in the sands evolves through the shearing process, and reaches the final state, which indeed has a unique fabric. The sand shows significant variation in strength with changing inclination of the principal stresses. The locus of the final stress state in principal stress space is also mapped from these series of experiments. Additional aspects of non-coaxiality, a benchmarking exercise with a few constitutive models is presented here. This experimental approach albeit indirect shows that a unique state which is dependent on the fabric, density and confining stress exists. This suite of experiments provides a well-controlled data set for a clear understanding on the mechanical behavior of sands.

Item Type:	Journal Article
Publication:	GRANULAR MATTER
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Keywords:	Anisotropy; Stress path; Shear strength; Failure
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	23 Apr 2015 07:40
Last Modified:	23 Apr 2015 07:40
URI:	http://eprints.iisc.ac.in/id/eprint/51357

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