Influence of Surface Roughness on Press Fits

Abstract A press fit, also known as interference fit or friction is a form of fastening between two tight fitting mating parts (usually bodies with cylinder conical surfaces) that produces joint which held together by after the are pushed together. I discuss influence surface roughness on design fits. This topic has been addressed in engineering community but only an empirical level without scientific backup. Here, will apply Persson contact mechanics theory to show how include criteria. argue one should use what denote “stylus width” rather than “caliper when determining compression (also denoted interference). In classical approach using caliper width, assumed be independent elastic properties solids, more accurate presented here stylus width depends and power spectra involved solids. detailed discussion relation root-mean-square amplitude $$h_{\mathrm{rms}}$$ h rms maximum asperity height $$h_{\mathrm{max}}$$ max , interest its own right, it needed for derived compression’s. Graphical