A Modified Approach in Modeling and Calculation of Contact Characteristics of Rough Surfaces

• Main Author: J.A. Abdo
• Format: Article
• Language: English
• Published: Sultan Qaboos University 2005-12-01
• Series: The Journal of Engineering Research
• Subjects: elastic-plastic, contact, friction, rough surfaces, contact model
• Online Access: https://journals.squ.edu.om/index.php/tjer/article/view/13

A mathematical formulation for the contact of rough surfaces is presented. The derivation of the contact model is facilitated through the definition of plastic asperities that are assumed to be embedded at a critical depth within the actual surface asperities. The surface asperities are assumed to deform elastically whereas the plastic asperities experience only plastic deformation. The deformation of plastic asperities is made to obey the law of conservation of volume. It is believed that the proposed model is advantageous since (a) it provides a more accurate account of elasticplastic behavior of surfaces in contact and (b) it is applicable to model formulations that involve asperity shoulder-to shoulder contact. Comparison of numerical results for estimating true contact area and contact force using the proposed model and the earlier methods suggest that the proposed approach provides a more realistic prediction of elastic-plastic contact behavior.