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- Title
Elasto-plastic analysis of the contact region between a rigid ellipsoid and a semi-flat surface.
- Authors
Pengyang Li; Lingxia Zhou; Fangyuan Cui; Quandai Wang; Meiling Guo; Yanfei Zhai; Yan Li; Dengxin Hua
- Abstract
When the load acting on a mechanical structure is greater than the yield strength of the material, the contact surface will undergo plastic deformation. Cumulative plastic deformation has an important influence on the lifespan of mechanical parts. This article presents a three-dimensional semi-analytical model based on the conjugate gradient method and fast Fourier transform algorithm, with the aim of studying the characteristic parameters of the contact region between a rigid ellipsoid and elasto-plastic half-space. Moreover, normal forces and tangential traction were considered, as well as the contact pressure resulting from various sliding speeds and friction coefficients. The contact pressure, effective plastic strain, von Mises stress, and residual stress were measured and shown to increase with increasing sliding velocity. Finally, when the friction coefficient, contact pressure, and effective plastic strain are increased, the von Mises stress is also shown to increase, whereas the residual stress decreases.
- Subjects
ELASTOPLASTICITY; ELLIPSOIDS; FOURIER transforms; CONTACT transformations; RESIDUAL stresses
- Publication
Advances in Mechanical Engineering (Sage Publications Inc.), 2018, Vol 10, Issue 9, p1
- ISSN
1687-8132
- Publication type
Article
- DOI
10.1177/1687814018797397