線接触におけるEHL潤滑面下の応力の解析

概要

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The internal stress in elastohydrodynamic lubrication (EHL) of rolling/sliding line contacts is calculated to discuss the possibility of pitting from the surface. Pressure distributions are calculated for three cases : 1 ) isothermal EHL (IEHL) , 2 ) thermal EHL (TEHL) and 3 ) non-Newtonian EHL of a circular model by Hamrock (NEHL). For each case, the maximum shear stress τ_<max> is calculated and discussed. Conclusions are as follows: 1 ) The maximum value of τ_<max> becomes larger and appears near the surface when the pressure spike Ps or the tangential traction Q becomes larger. 2 ) In case of Newtonian oil, Q becomes larger when the slip ratio increases. Q and Ps are reduced in the order of NEHL, TEHL, and IEHL. 3 ) When τ_<max> appears near the surface, τ_<xy> also takes the maximum value at the same point. 4 ) Whichever theory we use, there are some cases where τ_<max> appears near the surface due to the extremely high pressure spike even if Q is zero.
社団法人日本機械学会の論文
1992-09-25