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On the Precision and Complexity of Numerical Contact Calculations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The current paper analyses the complexity and precision of FEM calculations in 2 dimensional solid mechanics. The work shows that both grid refinement and domain enlargement are required to ...
Approximating EHL Film Thickness Profiles Under Transient Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In ElastoHydrodynamic Lubrication (EHL), transient processes are much more common than stationary ones. Predicting the film thickness under steady state conditions has become straight forward. Using ...
A Fast Solution of the Dry Contact Problem and the Associated Sub-Surface Stress Field, Using Multilevel Techniques
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The most time-consuming routine in the present EHL and dry contact computations is the calculation of the elastic deformation integrals. Using Multilevel Multi-Integration (MLMI) these integrals ...
Comparison of FFT-MLMI for Elastic Deformation Calculations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Numerical simulation of contact problems requires the calculation of the surface displacement of the contacting bodies. This is true for the lubricated contact, i.e., for elastohydrodynamic ...
Contact Pressure of Indented Wide Elliptical Contacts: Dry and Lubricated Cases
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Indents perturb the pressure and stress distribution and increase the failure risk of rolling element bearings. A numerical study of the pressure perturbation is proposed. An existing dry contact ...
Effect of a Dent on the Pressure Distribution in Dry Point Contacts
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Using a dry point contact model, a parametric study of the peak pressure due to a dent was performed. The parameters varied were the dent depth and diameter. The numerical analysis ws ...
Numerical Simulation of a Transverse Ridge in a Circular EHL Contact Under Rolling/Sliding
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates the influence of a transverse ridge on the film thickness in a circular EHL contact under rolling/sliding conditions. It is a numerical simulation of the optical EHL ...
Transient Analysis of Surface Features in an EHL Line Contact in the Case of Sliding
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates in detail the influence of two different surface topographies on the pressure distribution and film thickness profile of a highly loaded (maximum Hertzian pressure 2 GPa) ...
Numerical Analysis of the Influence of Waviness on the Film Thickness of a Circular EHL Contact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Surface roughness and/or surface imperfections are well known to significantly affect the performance of concentrated contacts. Any deviation from the smooth surface will act as a stress raiser ...
Discussion: “Solving EHL Problems Using Iterative, Multigrid, and Homotopy Methods” (Nurgat, E., Berzins, M., and Scales, L., 1999, ASME J. Tribol., 121, pp. 28–33)
Publisher: The American Society of Mechanical Engineers (ASME)