PSI - Issue 78

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 78 (2026) 105–112

© 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of XX ANIDIS Conference organizers Keywords: dynamic friction coefficient; low temperature; full-scale isolator test; curved surface slider Abstract This paper investigates the effect of the formation of ice on the coefficient of friction of sliding isolators. A full-scale sliding isolator was subjected to displacement-controlled cycles motions after exposure to temperatures of either 0 °C or -20 °C for different durations (3, 12 and 24 hrs). The tests were repeated at several pressures and velocities, and the obtained force-displacement curves are used to calculate static and dynamic friction coefficients. Exposure to low temperature leads to formation of an ice layer on the sliding surfaces which behaves as a lubricant. Thus, static friction coefficient decreases with respect to ambient temperature. Such a conclusion is contrary to the bounding analysis design approach of isolation systems where the low temperature exposure is assumed to be considered as an upper bound condition. 1. Introduction The dependency of the friction coefficient Curved Surface Sliders (CSS) on sliding velocity, contact pressure, temperature of the sliding surface, ageing and consequences of mounting defects have been widely investigated. XX ANIDIS Conference Investigation of the friction coefficient of sliding isolators in iced conditions Virginio Quaglini a, *, Eleonora Bruschi a , Esengül Çavdar b , Gökhan Özdemir b , Ûgurcan Özçamur c a Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy b Eskişehir Technical University, Iki Eylul Campus, 26555 Tepebasi, Eskişehir, Türkiye c TIS, Technological Isolation Systems, Emirgazi Mahallesi 35, Kahramankazan, 06980 Ankara, Türkiye

* Corresponding author. Tel.: 39-02-2399-4248. E- mail address: virginio.quaglini@polimi.it

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of XX ANIDIS Conference organizers 10.1016/j.prostr.2025.12.014