Estimation of the Real Area of Contact in Sliding Systems Using Thermal Measurements

Simple item page
dc.contributor.authorSchneck, William Carl IIIen
dc.contributor.committeechairVick, Brian L.en
dc.contributor.committeememberDiller, Thomas E.en
dc.contributor.committeememberHuxtable, Scott T.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:46:12Zen
dc.date.adate2009-10-14en
dc.date.available2014-03-14T20:46:12Zen
dc.date.issued2009-09-23en
dc.date.rdate2009-10-14en
dc.date.sdate2009-09-30en
dc.description.abstractThis thesis seeks two objectives. One objective is to develop a means to estimate time invariant real contact areas and surface temperatures through thermal measurements in 1D/2D systems. This allows computationally easier models, resulting in faster simulations within acceptable convergence. The second objective is to provide experimental design guidance. The methods used are a modified cellular automata technique for the direct model and a Levenberg-Marquardt parameter estimation technique to stabilize inverse solutions. The modified cellular automata technique enables each piece of physics to be solved independently over a short time step, thus frequently allowing analytical solutions to those pieces. Overall, the method was successful. The major results indicate that appropriately selected measurement locations can determine the contact distribution accurately, and that the preferred measurement location of the sensor is not very sensitive to the contact distribution specifics. This is useful because it allows selection of measurement locations regardless of the specifics of the generally unknown contact distribution. Further results show the combined effects of the normalized length and the Stanton number have a significant impact on the estimation quality, and can change the acceptable sensor domain, if the loss is high. The effect of placing the sensor in the static body can, for low loss, provide a coarse image of the contact distribution. This is useful because the static body is easier to instrument than a moving body. Finally, the estimation method worked well for the most complex model utilized, even in a sub-optimal measurement location.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-09302009-122724en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09302009-122724/en
dc.identifier.urihttp://hdl.handle.net/10919/35244en
dc.publisherVirginia Techen
dc.relation.haspartSchneck_WC_T_2009.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectreal area of contacten
dc.subjecttribologyen
dc.subjectfrictional heatingen
dc.subjectsliding surfacesen
dc.subjectparameter estimationen
dc.subjectcellular automataen
dc.titleEstimation of the Real Area of Contact in Sliding Systems Using Thermal Measurementsen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Schneck_WC_T_2009.pdf
Size:
1.9 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses