Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials

Abstract Micromechanical and tribological studies of geological materials with a particular focus on their contact-mechanics behavior at the grain scale are currently a major interest in the engineering and geoscience disciplines. In this study, a new robust micromechanical apparatus developed at th...

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Main Authors: Chitta Sai Sandeep, Kostas Senetakis
Format: Article
Language:English
Published: SpringerOpen 2019-02-01
Series:Friction
Subjects:
Online Access:http://link.springer.com/article/10.1007/s40544-018-0243-5
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spelling doaj-495af48cac994c359fdc630235e674e72020-11-25T01:10:22ZengSpringerOpenFriction2223-76902223-77042019-02-0181708210.1007/s40544-018-0243-5Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materialsChitta Sai Sandeep0Kostas Senetakis1City University of Hong KongCity University of Hong KongAbstract Micromechanical and tribological studies of geological materials with a particular focus on their contact-mechanics behavior at the grain scale are currently a major interest in the engineering and geoscience disciplines. In this study, a new robust micromechanical apparatus developed at the City University of Hong Kong is described; it is capable of conducting inter-granule (or inter-particle) loading tests on fine gravel to ballast-sized materials of sizes as small as 5−10 mm to granules (or ballast) as big as 50 mm. The focus of our study is the description of the major technical features of the new apparatus and its performance and repeatability in conducting experiments on reference grains of chrome steel balls and glass balls; in addition, we conducted a preliminary set of experiments on crushed granitic rock, which is a material widely used in geotechnical and transportation infrastructure. The representative results of these experiments are presented in terms of the normal force-displacement relationship, friction, and tangential stiffness. The newly developed large-size apparatus is further compared with a well-established apparatus that can conduct micromechanical tests on sand-sized materials.http://link.springer.com/article/10.1007/s40544-018-0243-5experimental micromechanicscontact mechanicslinear bearingsinter-particle frictiongranitedebris flow
collection DOAJ
language English
format Article
sources DOAJ
author Chitta Sai Sandeep
Kostas Senetakis
spellingShingle Chitta Sai Sandeep
Kostas Senetakis
Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
Friction
experimental micromechanics
contact mechanics
linear bearings
inter-particle friction
granite
debris flow
author_facet Chitta Sai Sandeep
Kostas Senetakis
author_sort Chitta Sai Sandeep
title Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
title_short Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
title_full Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
title_fullStr Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
title_full_unstemmed Micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
title_sort micromechanical experiments using a new inter-granule loading apparatus on gravel to ballast-sized materials
publisher SpringerOpen
series Friction
issn 2223-7690
2223-7704
publishDate 2019-02-01
description Abstract Micromechanical and tribological studies of geological materials with a particular focus on their contact-mechanics behavior at the grain scale are currently a major interest in the engineering and geoscience disciplines. In this study, a new robust micromechanical apparatus developed at the City University of Hong Kong is described; it is capable of conducting inter-granule (or inter-particle) loading tests on fine gravel to ballast-sized materials of sizes as small as 5−10 mm to granules (or ballast) as big as 50 mm. The focus of our study is the description of the major technical features of the new apparatus and its performance and repeatability in conducting experiments on reference grains of chrome steel balls and glass balls; in addition, we conducted a preliminary set of experiments on crushed granitic rock, which is a material widely used in geotechnical and transportation infrastructure. The representative results of these experiments are presented in terms of the normal force-displacement relationship, friction, and tangential stiffness. The newly developed large-size apparatus is further compared with a well-established apparatus that can conduct micromechanical tests on sand-sized materials.
topic experimental micromechanics
contact mechanics
linear bearings
inter-particle friction
granite
debris flow
url http://link.springer.com/article/10.1007/s40544-018-0243-5
work_keys_str_mv AT chittasaisandeep micromechanicalexperimentsusinganewintergranuleloadingapparatusongraveltoballastsizedmaterials
AT kostassenetakis micromechanicalexperimentsusinganewintergranuleloadingapparatusongraveltoballastsizedmaterials
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