A new statistical model was developed for the normal and tangential contact parameters of rough surfaces based on the elasticplastic contact theory of asperity.
A model for elastic-plastic nominally at contacting rough surfaces under combined normal and tangential loading with full stick contact condition is presented. The model A Model of Tangential Contact Damping Considering You JM, Chen TN. Statistical model for normal and tangential contact parameters of rough surfaces. Arch Proc Inst Mech Eng Part C J Mech Eng Sci 19891996 (vols
The acoustic model of contact, previously proposed for longitudinal ultrasonic waves, was adopted for shear waves. It was found that the measurements of the phase shift of coefficient of reflection from the contact interface allows us to find the tangential to normal contact stiffness ratio for the contact tested. However, an analysis based on the Greenwood-Williamson model and the Hertz Closed-Form Equations for Contact Force and Moment in In this paper, we consider the contact between two rectangular rough surfaces that provide normal and tangential contact force as well as contact moment to counteract the net moment imposed by the applied forces. The surfaces are permitted to develop slight angular misalignment, and thereby contact moment is derived.
developed. The analyses for both forces during normal and tangential separation of hydrophilic and hydrophobic smooth or rough surfaces with symmetric and asymmetric contact angles, and viscous force effects during tangential separation are presented. The important design parameters, i.e., separation distance, initial meniscus height, separation Contact of surfaces under small tangential displacementsCurrently available approaches to the description of the contact of real engineering surfaces under the effect of normal and tangential forces are considered.
Currently available approaches to the description of the contact of real engineering surfaces under the effect of normal and tangential forces are considered. Contact stiffness of randomly rough surfacesWe investigate the contact stiffness of an elastic half-space and a rigid indenter with randomly rough surface having a power spectrum , where q is the wave vector. The range of is studied covering a wide range of roughness types from white noise to smooth single asperities. At low forces, the contact stiffness is in all cases a power law function of the normal force with an exponent .
The behavior of an elastic-plastic contact of a deformable sphere and a rigid flat under combined normal and tangential loading with full stick contact condition is investigated theoretically. Flattening of loaded rough surfaces:normal contact Summary:The problem of contact of deformable rough surface with rigid flat counterpart was investigated theoretically and experimentally. In the special experimental setup two modes of rough surface flattening were performed:normal compression and sliding (tangential load) in presence of normal compression.
However, this tangential contact problem becomes more complex for arbitrary loading scenarios since the state of stress depends not only upon the initial state of loading but also upon the complete loading history . One could assume that considering the tangential contact of nominally flat rough surfaces under Investigation of Tangential Contact Damping of Rough Abstract. The contact damping between rough surfaces has an important influence on the wear, vibration, contact fatigue, and energy dissipation between interfaces. In this paper, based on contact theory, a tangential damping mathematical model of rough surfaces is established from the point of view of viscous contact damping energy dissipation mechanism of asperities and considering the fractal characteristics of three-dimensional topography of rough surfaces.
The paper considers elastic contact of rough surfaces and develops a simple analytical eion for the stiffness of the contact under tangential loading, which predicts that the contact Investigation of normal and tangential contact stiffness The paper considers elastic contact of rough surfaces and develops a simple analytical eion for the stiffness of the contact under tangential loading, which predicts that the contact
of realistic rough surfaces under lightly loaded conditions. Both Hertzian spherical con-tacts and at rough surfaces in contact under normal loads of up to 1000 mN were studied. Due to roughness, measured contact stiffness values are signicantly lower than theoretical values predicted from smooth surfaces in contact. Also, the measured values Modeling Tangential Contact of Rough Surfaces With Elastic May 26, 2017 · A new tangential contact model between a rough surface and a smooth rigid flat is proposed in this paper. The model considers the contribution of both elastically deformed asperities and plastically deformed asperities to the total tangential load of rough surface.
T1 - Modeling of normal and tangential contact stiffness of rough surfaces. AU - Abdo, Jamil. PY - 2005. Y1 - 2005. N2 - It is well recognized that the contact stiffness is one of the key features in the study of friction system behavior. The stiffness of a rough surface influences the contact state as well as the behavior of the surrounding Modeling tangential contact based on non-Gaussian rough A stick-slip tangential contact model between rough surfaces was proposed in this paper. The Mindlin partial slip solution for elastic contact and the double linear formulation developed by
A stick-slip tangential contact model between rough surfaces was proposed in this paper. The Mindlin partial slip solution for elastic contact and the double linear formulation developed by Normal and Tangential Contact problem - DASSAULT:Normal and Tangential Contact problem WayneKagawa (Structural) (OP) Tangential - The two surfaces have a coefficient of friction of 0.7 between them and they slip as soon as the critical load is reached. The reference value of the stiffness of the Stress vs Slip graph is 7x10^9 N/m 3. I used the PENALTY method and just gave the coefficient
Normal and tangential compliances of interface of rough surfaces with contacts of elliptic shape Igor Sevostianova,*, Mark Kachanovb a Department of Mechanical Engineering, New Mexico State University, PO Box 30001, Las Cruces, NM 88003, USA bDepartment of Mechanical Engineering, Tufts University, Medford, MA 02155, USA Received 26 October 2007; received in revised form 26 December 2007 Normal and tangential compliances of interface of rough The incremental compliances, normal and tangential, of an interface between rough surfaces are considered. Contacts are assumed to be elliptic the shape of Hertzian contacts between any two locally smooth asperities. The ellipses may
Jun 01, 2016 · Normal and tangential incremental contact stiffnesses (K N C and K T C, respectively) per unit nominal contact area in S are defined as:(1) K N C = d F N d w, K T C = d F T d s where dw and ds are the increments of the relative displacements at the contact interface region in normal (i.e., along e 3) and tangential (i.e., parallel to Normal and tangential stiffnesses of rough surfaces in Normal and tangential stiffnesses of rough surfaces in contact via an imperfect interface model . aiming to describe the mechanical behavior of two rough surfaces in no-sliding contact under a closure pressure. The contact region between two elastic bodies is described as a thin damaged interphase characterized by the occurrence of non
Normal and tangential stiffnesses of rough surfaces in contact via an imperfect interface model Maria Letizia Raffaa,b,, Frédéric Lebona, Giuseppe Vairob a LMA, Aix-Marseille University, CNRS, Centrale Marseille, 4 Impasse Nikola Tesla CS 40006, 13453 Marseille Cedex 13, France b Department ofCivil Engineeringand Computer Science (DICII), University Rome Tor Vergata, via del Normal contact stiffness of rough surfaces considering The contact stiffness of joint surface in a complex mechanical product is a vital component of overall stiffness. 1,2 At the same time, it shows that contact stiffness varies with contact load, contact state, material, processing method, surface roughness, and surface structure. These factors result in complicated mechanism and many nonlinear variables when studying the contact stiffness. 3,4
ments of the tangential contact stiness between rough surfaces manufactured from titanium alloy using a digital image correlation method have been recently investigated by Kartal et al. . In the paper we derive an eion for the normal contact stiness (Sec-tions 3 and 4) using the fractal theory (Section 2). The numerical results are Numerical modelling of rough particle contacts subject to Oct 29, 2019 · At a given normal force, the tangential force at which sliding occurs is lower for rough surfaces than for perfectly smooth surfaces. However, a clear trend of stiffness reducing with increasing roughness is not obvious; most of the MR surface responses are
If two elastic bodies with rough surfaces are first pressed against each other and then loaded tangentially, sliding will occur at the boundary of the contact area while the inner parts may still stick. With increasing tangential force, the sliding parts will expand while Partial-slip frictional response of rough surfacesTangential contact of rough surfaces was studied in 9,10 and 11. In particular, in 9 it was shown that the ratio of normal and tangential stiffnesses in a complete stick-contact remains the same as in the case of single rotationally symmetric contacts (Cattaneo and Mindlin ratio 12,13).
Jan 01, 2011 · A new statistical model was developed for the normal and tangential contact parameters of rough surfaces based on the elasticplastic contact theory of asperity. Four deformed regimes of fully elastic, first elastoplastic, second elastoplastic, and fully plastic of an asperity contacting with a rigid surface were taken into account by this model. Statistical model for normal and tangential contact Statistical model for normal and tangential contact parameters of rough surfaces January 2010 ARCHIVE Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical
Statistical model for normal and tangential contact parameters of rough surfaces January 2010 ARCHIVE Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical The study of anisotropic rough surfaces contact Oct 01, 2018 · Fig. 1 shows the force analysis on an asperity when a pair of asperities contacts under the normal force F i.The normal force F i can be divided into three component forces, which are the normal component force F i n, the tangential component force F i and the horizontal component force F i s, respectively. and e the contact angle and the contact azimuthal angle, respectively.
contact subjected to the normal preload and cyclic tangential loading during pre-sliding; comparison between the theoretical and experimental results. 2. THE MODEL Figure 1 presents a deformable sphere of a radius R in contact with a rigid flat under combined normal and tangential loading. Two-dimensional normal and tangential rail/wheel contact Therefore a two-dimensional stochastical model for the normal and tangential contact of rough surfaces is introduced that works very fast. The surface profiles used in the computations with the deterministic model are evaluated in terms of statistical parameters needed in the stochastical model and the results of the two models are compared.
Dec 15, 2019 · Contact of rough surfaces under normal and tangential loading 1. Introduction. The flattening of rough surfaces as a result of contact loading occurs in many technical applications. 2. Experiments. The experiment was carried out using a modified version of