Comparison of contact stresses of the test tyres used by the 1/3rd scale model mobile load simulator (MMLS3) and the full-scale test tyres of the heavy vehicle simulator (HVS) – a summary

dc.contributor.authorDe Beer, M.
dc.contributor.authorSadzik, E.
dc.date.accessioned2008-06-18T06:24:19Z
dc.date.available2008-06-18T06:24:19Z
dc.date.issued2007-07
dc.descriptionThis paper was transferred from the original CD ROM created for this conference. The material on the CD ROM was published using Adobe Acrobat technology. The original CD ROM was produced by Document Transformation Technologies Postal Address: PO Box 560 Irene 0062 South Africa. Tel.: +27 12 667 2074 Fax: +27 12 667 2766 E-mail: doctech@doctech.co.za URL: http://www.doctech.co.zaen
dc.description.abstractPaper presented at the 26th Annual Southern African Transport Conference 9 - 12 July 2007 "The challenges of implementing policy?", CSIR International Convention Centre, Pretoria, South Africa. ABSTRACT:This paper summarises the results of a study in which the maximum vertical contact stresses of the 1/3rd scale test tyres of the Model Mobile Load Simulator (MMLS3) were compared with those measured for three types of full-scale test tyres of the Heavy Vehicle Simulator (HVS). The comparative tests were done using the Stress-In-Motion (SIM) device designed to capture three-dimensional (3D) tyre-pavement contact stresses on a relatively rough-textured test surface. As it is generally accepted that these stress conditions within the moving tyre contact patch are quite complex, a single parameter of the vertical stresses measured for the different test tyres was selected for the comparison. This parameter, referred to as the Maximum Vertical Contact Stress (MVCS) indicated, on average, that it increased linearly with tyre inflation pressure for both types of the 1/3rd scale MMLS3 test tyres and full-scale test tyres. However, it was found that the MVCSs for the Diamond patterned square profile 1/3rd scale tyres of the MMLS3 were, on average, much lower than those of the full-scale test tyres as they represented, at most, only 52.5 per cent of those measured for the 11R22.5 (full-scale HVS) test tyre, 37.5 per cent for the single 315/80 R22.5 (full-scale HVS) test tyre, and 12.5 per cent and 20 per cent respectively respectively for the smooth and rough-texture tests on the 12R22.5 (full-scale HVS) test tyre. Earlier studies of vertical contact stresses of the test tyres of the MMLS3 by Sime M & Ashmore SC, (1999), Epps Martin et al (2000) and Doupal et al (2002) that were conducted with different stress measuring devices reported higher vertical contact stresses at the upper level of tyre inflation pressures. It is therefore recommended that the influence of test surface characteristics and the impact on SIM measurements of HVS and MMLS3 tyres be investigated in greater detail in future similar studies. It is nevertheless strongly recommended that the foregoing be incorporated into MMLS3 and HVS comparative and/or individual testing programs (and protocols) to permit a more rational interpretation of test data from both these devices relative to structural road pavement performance issues, especially on the surface of flexible road pavements.en
dc.format.extent488199 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationDe Beer, M & Sadzik, EM 2007,'Comparison of contact stresses of the test tyres used by the 1/3rd scale model mobile load simulator (MMLS3) and the full-scale test tyres of the heavy vehicle simulator (HVS) – a summary', Paper presented to the 26th Annual Southern African Transport Conference, South Africa, 9 - 12 July 2007. 10p.en
dc.identifier.isbn192001702X
dc.identifier.urihttp://hdl.handle.net/2263/5952
dc.languageeng
dc.language.isoenen
dc.publisherSATCen
dc.relation.ispartofSATC 2007
dc.rightsUniversity of Pretoriaen
dc.subjectTransport policiesen
dc.subjectModel Mobile Load Simulator (MMLS3)en
dc.subjectHeavy Vehicle Simulator (HVS)en
dc.subjectMaximum Vertical Contact Stress (MVCS)en
dc.subjectStress-In-Motion (SIM)en
dc.subjectTyre-pavement contact stressesen
dc.subject.lcshTransportation -- South Africa -- Congressesen
dc.subject.lcshTires -- South Africa -- Testing -- Congressesen
dc.titleComparison of contact stresses of the test tyres used by the 1/3rd scale model mobile load simulator (MMLS3) and the full-scale test tyres of the heavy vehicle simulator (HVS) – a summaryen
dc.typeEventen
dc.typePresentationen

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
121.pdf
Size:
476.76 KB
Format:
Adobe Portable Document Format
Description:
DeBeer_Comparison(2007)

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
2.4 KB
Format:
Item-specific license agreed upon to submission
Description: