ABSTRACT
We.saw.in.Section.5.2.2.concerning.a.back-calculation.analysis.of.Thirion’s. data.[1].that,.on.Cartesian.coordinates,.the.adhesive.friction.forces.associated. with. the. two.differently.sized.rubber.specimens.sliding.on.a.macroscopically.smooth.surface.exhibited.straight.lines.only.in.the.lower.FN.range..At. higher.loadings.(Figures.5.6.and.5.7),.the.plots.curved.parabolically.in.a.way. consistent.with.the.adhesion.force.increasing,.but.at.a.slower.rate.than.the. applied.normal.load..Plotting.Thirion’s.adhesion.data.on.logarithmic.coordinates.as.FA.vs..FN.(Figure.5.9).produced.two.straight.lines.for.each.data.set. that. intersected. at. different. values. of. the. applied. normal. force.. Graphing. Thirion’s.data.on.logarithmic.coordinates.as.FA.vs..PN.(Figure.5.10),.however,. yielded.two.straight.lines.for.each.data.set.that.intersected.at.the.same.value. of.PN..We.termed.this.value.the.adhesion transition pressure,.or.PNt.
