A theoretical justification of the slip index concept in fretting analysis  

作　　者：Ivan I.ARGATOV Young S.CHAI 

机构地区：[1]Institut für Mechanik,Technische Universität Berlin,10623 Berlin,Germany [2]School of Mechanical Engineering,Yeungnam University,Gyeongsan 712-749,Republic of Korea

出　　处：《Friction》2023年第7期1265-1275,共11页摩擦（英文版）

基　　金：supported by the 2021 Yeungnam University Research Grant.

摘　　要：Fretting in the partial-slip and gross-slip regimes under a constant normal load is considered.The tangential force-displacement relations for the forward and backward motions are described based the generalized Cattaneo-Mindlin theory of tangential contact and Masing's hypothesis on modelling the force-displacement hysteretic loop.Besides the critical force and displacement parameters(characterizing the triggering of sliding),the model includes one dimensionless fitting parameter that tunes the tangential contact stiffness of the friction-contact interface.Explicit expressions are derived for the main tribological parameters of the fretting loop,including the slip index and the signal index.The presented phenomenological modelling approach has been applied to the analysis of two sets of experimental data taken from the literature.It has been shown that the experimentally observed simple relation of a rational type between the slip index and the slip ratio corresponds to the gross-slip asymptotics of the corresponding model-based predicted relation.The known quantitative criteria for the transition from the partial slip regime to the gross slip regime are expressed in terms of the stiffness parameter,and a novel geometric transition criterion is formulated.

关 键 词：fretting wear slip index signal index partial slip energy ratio 

分 类 号：TB302[一般工业技术—材料科学与工程] O363.2[理学—流体力学]