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

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dc.contributor.author De Beer, M.
dc.contributor.author Sadzik, E.
dc.date.accessioned 2008-06-18T06:24:19Z
dc.date.available 2008-06-18T06:24:19Z
dc.date.issued 2007-07
dc.description This 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.za en
dc.description.abstract Paper 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
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dc.format.mimetype application/pdf
dc.identifier.citation De 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.isbn 192001702X
dc.identifier.uri http://hdl.handle.net/2263/5952
dc.language eng
dc.language.iso en en
dc.publisher SATC en
dc.relation.ispartof SATC 2007
dc.rights University of Pretoria en
dc.subject Transport policies en
dc.subject Model Mobile Load Simulator (MMLS3) en
dc.subject Heavy Vehicle Simulator (HVS) en
dc.subject Maximum Vertical Contact Stress (MVCS) en
dc.subject Stress-In-Motion (SIM) en
dc.subject Tyre-pavement contact stresses en
dc.subject.lcsh Transportation -- South Africa -- Congresses en
dc.subject.lcsh Tires -- South Africa -- Testing -- Congresses en
dc.title 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 en
dc.type Event en
dc.type Presentation en


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