Distinct stick-slip modes in adhesive polymer interfaces

Viswanathan, Koushik and Sundaram, Narayan K (2017) Distinct stick-slip modes in adhesive polymer interfaces. In: WEAR, 376 (B). pp. 1271-1278.

PDF WEAR_376_1271_2017.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

Stick-slip, manifest as intermittent tangential motion between two solids, is a well-known friction instability that occurs in a number of natural and engineering systems. In the context of adhesive polymer interfaces, this phenomenon has often been solely associated with Schallamach waves, which are termed slow waves due to their slow propagation speeds. We study the dynamics of a model polymer interface using coupled force measurements and high speed in situ imaging, to explore the occurrence of stick-slip linked to other slow wave phenomena. Two new waves-slip pulse and separation pulse-both distinct from Schallamach waves, are described. The slip pulse is a sharp stress front that propagates in the same direction as the Schallamach wave, while the separation pulse involves local interface detachment and travels in the opposite direction. Transitions between these stick-slip modes are easily effected by changing the sliding velocity or normal load. The properties of these three waves, and their relation to stick-slip is elucidated. We also demonstrate the important role of adhesion in effecting wave propagation. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	WEAR
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	15 Jul 2017 04:56
Last Modified:	15 Jul 2017 04:56
URI:	http://eprints.iisc.ac.in/id/eprint/57403

Actions (login required)

View Item