Experimental Studies on the Kinematics of Cutting in Granular Materials

Murthy, TG and Saldana, C and Yadav, S and Du, F (2013) Experimental Studies on the Kinematics of Cutting in Granular Materials. In: 7th International Conference on Micromechanics of Granular Media, JUL 08-12, 2013 , Sydney, AUSTRALIA, pp. 919-922.

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Abstract

Slow flow in granular materials is characterized by high solid fraction and sustained inter-particle interaction. The kinematics of trawling or cutting is encountered in processes such as locomotion of organisms in sand; trawl gear movement on a soil deposit; plow movement; movement of rovers, earth moving equipment etc. Additionally, this configuration is very akin to shallow drilling configuration encountered in the mining and petroleum industries. An experimental study has been made in order to understand velocity and deformation fields in cutting of a model rounded sand. Under nominal plane strain conditions, sand is subjected to orthogonal cutting at different tool-rake angles. High-resolution optical images of the region of cutting were obtained during the flow of the granular ensemble around the tool. Interesting kinematics underlying the formation of a chip and the evolution of the deformation field is seen in these experiments. These images are also analyzed using a PIV algorithm and detailed information of the deformation parameters such as velocity, strain rate and volume change is obtained.

Item Type:	Conference Proceedings
Series.:	AIP Conference Proceedings
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to AMER INST PHYSICS, USA.
Keywords:	orthogonal cutting; image analysis; velocity fields; shear bands
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	10 Sep 2013 05:49
Last Modified:	10 Sep 2013 05:49
URI:	http://eprints.iisc.ac.in/id/eprint/47092

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