Three-dimensional modeling of elasto-plastic sinusoidal contact under time dependent deformation due to stress relaxation |
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| Affiliation: | 1. Department of Mechanical Engineering, Auburn University, Auburn, AL 36849, USA;2. Power and Actuators, Siemens Corporate Technology, 81379 Munich, Germany;1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China;2. Beijing Laboratory for Modern Transportation Advanced Metal Materials and Processing Technology, University of Science and Technology Beijing, Beijing 100083, China;1. University of Lorraine/CNRS/CREGU, GeoRessources Laboratory, BP 40, 54501 Vandoeuvre-lès-Nancy, France;2. Total CSTJF, Avenue Larribau, 64000 Pau, France;1. Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas, Heraklion, Greece;2. Department of Biology, University of Crete, Heraklion, Greece |
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| Abstract: | In the current work, the effect of stress relaxation in contact between sinusoidal surfaces is studied using FE simulations. There are a few works on the elastic and elasto-plastic contact between sinusoidal surfaces, but the transient effects such as creep and stress relaxation are not considered in these works. Stress relaxation causes significant change in the contact area and pressure between the contacting surfaces. The Garofalo formula is used to model the transient behavior of stress relaxation. The results for the contact area and contact pressure are presented and discussed. Empirical equations are developed to predict contact area and pressure by fitting to the FEM results. The equations are dependent on the initial surface separation, aspect ratio, and the Garofalo constants. |
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| Keywords: | Asperity Sinusoidal contact Stress relaxation Garofalo creep law |
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