Abstract
<jats:p> This paper presents a numerical study on the cyclic indentation of an elastic-perfectly plastic half-space by a rigid sphere. The study is performed using non-linear finite element methods. Results of contact pressure distribution, relationships between contact force, displacement and contact radius during loading, unloading and reloading are presented. The results show that the deformation during unloading from a contact beyond the elastic limit is perfectly elastic. However, the pressure distribution returns to the Hertzian elliptical distribution only when the maximum pressure at the contact centre is below 1.6α<jats:sub>y</jats:sub>. The reloading curve is found to be exactly the same as the unloading curve and the pressure distributions in reloading and unloading are the same for the same contact force. The influence of the plastic permanent deformation and residual stresses on the contact behaviour during reloading is discussed. </jats:p>
Original language | English |
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Pages (from-to) | 505-514 |
Number of pages | 0 |
Journal | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science |
Volume | 217 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 May 2003 |