Ultrasonic compaction of granular geological materials

Feeney, A. , Sikaneta, S., Harkness, P. and Lucas, M. (2017) Ultrasonic compaction of granular geological materials. Ultrasonics, 76, pp. 136-144. (doi: 10.1016/j.ultras.2017.01.004) (PMID:28088705)

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It has been shown that the compaction of granular materials for applications such as pharmaceutical tableting and plastic moulding can be enhanced by ultrasonic vibration of the compaction die. Ultrasonic vibrations can reduce the compaction pressure and increase particle fusion, leading to higher strength products. In this paper, the potential benefits of ultrasonics in the compaction of geological granular materials in downhole applications are explored, to gain insight into the effects of ultrasonic vibrations on compaction of different materials commonly encountered in sub-sea drilling. Ultrasonic vibrations are applied, using a resonant 20kHz compactor, to the compaction of loose sand and drill waste cuttings derived from oolitic limestone, clean quartz sandstone, and slate-phyllite. For each material, a higher strain for a given compaction pressure was achieved, with higher sample density compared to that in the case of an absence of ultrasonics. The relationships between the operational parameters of ultrasonic vibration amplitude and true strain rate are explored and shown to be dependent on the physical characteristics of the compacting materials.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew and Lucas, Professor Margaret and Harkness, Professor Patrick
Authors: Feeney, A., Sikaneta, S., Harkness, P., and Lucas, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Ultrasonics
ISSN (Online):1874-9968
Published Online:05 January 2017
Copyright Holders:Copyright © 2017 Elsevier
First Published:First published in Ultrasonics 76:136-144
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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