کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
800156 | 1467166 | 2006 | 23 صفحه PDF | دانلود رایگان |

A statistical model for the unloading of elastic–plastic contact of rough surfaces is presented for a single load–unload cycle. The hystereses of load-separation and load real contact area behavior are analyzed for a wide range of surface roughness and loading conditions. The residual topography of the unloaded rough surfaces is also analyzed and the new distribution functions of asperity heights and summit radii of curvature along with a corresponding GW residual plasticity index are presented. A new modified plasticity index (MPI) is suggested which considers the energy dissipation due to unrecovered plastic deformations. This MPI varies from zero for purely elastic contacts to unity for purely plastic contacts and hence, can better define the level of plasticity of contacting rough surfaces compared to the original GW plasticity index.
Journal: Journal of the Mechanics and Physics of Solids - Volume 54, Issue 12, December 2006, Pages 2652–2674