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MIXEDEHL SIMULATOR FOR ROLLINGSLIDING LINECONTACTSThe simulation app for mixedEHL rollingsliding line contacts has been developed based on the capabilities of the CamRollerInterface Tribotester (CRT01). The CRT01 as well as the simulation app, allow the user to evaluate the resulting slidetoroll ratio (SRR) and traction coefficient (among others) generated in a lubricated roller on roller (i.e., disc on disc) configuration when a load torque is applied to the driven roller. Differently from classic twin disc machines, the CRT01 allows the generation of slippage throughout the application of a load torque (i.e., braking torque) to one of the rollers. This means that slippage is not a fixed variable during the test but, a result of the applied braking torque. Hence, changes in the tractive behavior of surfaces produced by wear (or other factors) can be studied based on the variations of the SRR measured through the test. The interested user can refer to https://www.tribonet.org/news/testingofcamrollerfollowersystems/ and https://www.youtube.com/watch?v=LViW5rxueoM for more information about the testing method and the test setup. Instructions for use: The mixedEHL simulator for rolling sliding line contacts is divided into 3 different panels. The reference conditions, the controls, and the results. Reference Conditions: A set of reference conditions is given by default. They include contact conditions, material properties, and lubricant properties. The user can modify these values and click "Run" to display the results. Control Panel: The app allows the adjustment of 5 parameters for the simulation, namely, the load (L), the speed (ωR1), the temperature of the lubricant, the load torque, and the offset angle (Ψ). Note that with Ψ=0, the contact force is equal to the load (L). After adjusting the controls, the results can be obtained by clicking "Run". Results The results panel displays several results that can be used to evaluate the tribological behavior of the simulated contact. They include the lambda ratio, the traction coefficient, and the slidetoroll ratio, among others. Note that the slidetoroll ratio increases when higher load torques (i.e., braking torque) are applied. Read More45 downloads20.01.2022

TriboSolverTriboSolver (formerly known as Tribology Simulator) is a cloud based software for the simulation of the most common tribological problems: rough contact problem (pressure and subsurface stress calculations, deflections, stiffnesses), Elastohydrodynamic problem, Stribeck Curve simulation (calculation of friction in mixed lubricated contacts), calculation of contact temperatures in solids, wear and wear particles simulation and surface roughness evolution. You can find a guide on how to use TriboSolver here. The old version of TriboSolver can still be downloaded here. A manual can be found in the Help section. If you dont have MATLAB installed, you will need to install the MATLAB Compiler Runtime (MCR, free for download). See readme.txt file for further details. Solvers are based on the halfspace approximation theory for the contact, thermal and hydrodynamic simulations, which makes it faster compared to Finite Element Method or other fully numerical approaches. Read More1802 downloads29.03.2022

Friction Calculation (Mixed Lubrication)A Matlab code (GUI) for calculation of friction coefficient in mixed lubricated conditions. Asperity based, including statistical (Greenwood and Williamson), deterministic models. Fully elastic and elasticplastic deformation regimes. Both point and line contact cases considered. Applicable to the contact with uniform film thickness (highly loaded). Moes fit is used to calculate central film thickness. Run stribeck_simulator.m. Read More524 downloads30.07.2016
As a beginner in the gear and bearing lubrication modeling, I BELIEVE the effort made to develop this MATLAB code (publically available) is highly appreciated. Thank you !