Incipient sliding of adhesive contacts

• Published in: Friction Vol. 10; no. 6; pp. 963 - 976
• Main Authors: Pérez-Ràfols, Francesc, Nicola, Lucia
• Format: Journal Article
• Language: English
• Published: Beijing Tsinghua University Press 01-06-2022; Springer Nature B.V
• Subjects: Adhesion; Adhesives; Compliance; Contact pressure; Corrosion and Coatings; Engineering; Friction; Interfacial bonding; Mathematical models; Mechanical Engineering; Microelectromechanical systems; Nanotechnology; Parameters; Physical Chemistry; Polydimethylsiloxane; Pressure distribution; Research Article; Sliding; Surfaces and Interfaces; Thin Films; Tribology; traction-separation laws; adhesion; incipient sliding
• ISSN: 2223-7690; 2223-7704
• DOI: 10.1007/s40544-021-0546-9

A model is proposed herein to investigate the incipient sliding of contacts in the presence of both friction and adhesion, where the interfacial response is modeled based on traction-separation laws. A Maugis-like parameter is defined to characterize the response in the tangential direction. Subsequently, the model is used to investigate the contact between a smooth cylinder and a flat body, where adhesion-friction interactions are strong. A range of behaviors are observed when a tangential displacement is imposed: When the parameter is low, the contact pressure exhibits a relatively constant profile; when it is high, a pressure spike is observed at the edge of the contact. This difference is caused by a significant interface compliance in the former case, which limits the amount of slip. The results for the mid-range values of the Maugis-like parameter can qualitatively replicate various experiments performed using polydimethylsiloxane (PDMS) balls.