A study on the effect of the clearance on the contact stresses and kinematics of polymeric composite journal bearings under reciprocating sliding conditions

Abstract

The effect of the clearance on the contact stresses and kinematics of a polymeric composite journal bearing is investigated. To this purpose a test rig is devised, which is capable to measure the tribological characteristics of the large-scale composite bearings. Kinematics of the setup is simulated by a 2D FE model. Moreover, to evaluate the contact area between the bearing and shaft, pressure indicator films are used and a simplified 3D model is provided. Simulation results correspond closely to the experiments and it is shown that the clearance variation can have a big impact on the contact stresses distribution.

An Experimental Study of Composite Plain Bearings: The Influence of Clearance on Friction Coefficient and Temperature

“…The conducted study is based on the approach used by Rezaei et al [4], who studied the clearance influence on the contact stresses in polymeric composite journal bearings. Rezaei et al conducted an experiment using two different bearings, each having a different vertical load, clearance, and width.…”

“…For the dry running specimen, Rezaei et al [4] conducted an experimental study using the oscillatory motion, often found in mechanical joints. The clearance was found to have a significant impact on the contact stress distribution.…”

“…For this reason, in this article, the authors investigated whether the clearance has an influence on friction coefficient and wear in plain bearings operating at constant rotational speed, as found in mechanical transmissions. The rotational shaft movement was used instead of the oscillatory one to more precisely simulate a bearing-shaft system [4].…”

“…The performance of a plain bearing can be evaluated through a number of criteria, such as its efficiency [1], durability [2], or load-carrying capacity [3]. As such, it is influenced by several parameters: load, sliding velocity, operating temperature, surface roughness, clearance between the plain bearing and the shaft [4], and material.…”

Design and Analysis of An Integrated Exhaust Manifold with Turbocharger for Considerable Reduction of Over Heating of Bearing System

“…[7]. Many studies have been carried out about the impact of the clearance on the contact stresses [8] and also their impact on the rotor-stator collisions and related resonances and self-excited vibrations [9]. Interestingly, influence of joint clearances were also studied [10].…”