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dc.contributor.authorBryan, Matthewen
dc.contributor.authorRough, Sarahen
dc.contributor.authorWilson, Ianen
dc.date.accessioned2018-01-16T15:59:21Z
dc.date.available2018-01-16T15:59:21Z
dc.date.issued2018-01-01en
dc.identifier.issn0032-5910
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/270652
dc.description.abstractThe wall slip behaviour of a solid granular soap was investigated in the context of ram extrusion, with particular focus on determining the sensitivity of the wall shear stress to the pressure within the soap, as well as the slip velocity. Two novel slip measurement devices were used to infer the shear stress: a two stage extrusion die with inbuilt pressure gradient measurement; and a combined compression-translation assembly to measure the frictional force between the soap and the wall. Both devices provided differing measurements of the pressure sensitivity, and gave shear stress estimates in agreement with a Benbow and Bridgwater (1993) analysis of the extrusion behaviour, which cannot gauge pressure dependence. The influence of the wall material on the slip and extrusion behaviour was also investigated, using three geometrically identical extruders constructed from polycarbonate, stainless steel and tungsten carbide. There was found to be a non-negligible relationship between wall material, wall surface roughness, and the Benbow-Bridgwater extrusion parameters, in which the wall shear stress was greatest against the smoothest, cemented tungsten carbide wall in contrast to a rougher stainless steel and rougher-still polycarbonate wall. Keywords: extrusion, wall slip, soft solids
dc.language.isoenen
dc.publisherElsevier
dc.titleMeasurement of the wall slip behaviour of a solid granular soap in ram extrusionen
dc.typeArticle
prism.endingPage85
prism.publicationDate2018en
prism.publicationNamePowder Technologyen
prism.startingPage76
prism.volume323en
dc.identifier.doi10.17863/CAM.17584
dcterms.dateAccepted2017-09-25en
rioxxterms.versionofrecord10.1016/j.powtec.2017.09.053en
rioxxterms.versionAMen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-01-01en
dc.contributor.orcidBryan, Matthew [0000-0001-9134-384X]
dc.contributor.orcidWilson, Ian [0000-0003-3950-9165]
dc.identifier.eissn1873-328X
rioxxterms.typeJournal Article/Reviewen
rioxxterms.freetoread.startdate2018-09-30


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