Development of a pressure-, velocity-, and acceleration-dependent phenomenological friction model using experimental data of sliding tests between 11 polymers and stainless steel

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dc.contributor.authorTapia, Nicolas F.
dc.contributor.authorReyes, Sergio I.
dc.contributor.authorVassiliou, Michalis F.
dc.contributor.authorAlmazan, Jose L.
dc.date.accessioned2025-01-20T16:10:22Z
dc.date.available2025-01-20T16:10:22Z
dc.date.issued2024
dc.description.abstractThis paper experimentally investigates the frictional behavior between stainless steel and 11 polymers. Particularly, the dependence of the friction coefficient on the sliding velocity, pressure, and acceleration is quantified. The novelty of this work lies in quantifying the acceleration-dependent nature of friction, correlating it to the well-documented Stick-Slip effect. The experimental setup consisted of two parallel stiff steel beams, one above the other, with a separation of 95 mm, and steel surfaces welded at the inner sides for sliding the polymers. Cylindrical polymer pads were placed between the stainless-steel surfaces and connected to a dynamic actuator to apply the displacement protocol. The protocol consisted of consecutive nominally constant-velocity ramp cycles covering velocities from 1 mm/s to 300 mm/s (with 20 mm/s increments). An additional vertical force was applied with a hydraulic actuator to reach nominal pressures in the polymers between 5 and 80 MPa. The results showed that the friction coefficient depends on the velocity, pressure, and acceleration of the motion, and a phenomenological model on these three variables is proposed. The velocity dependence can be represented through a logarithmic relationship, while the pressure dependence is through an exponential decay relationship. The acceleration dependence was represented through a linear relationship, which could capture the stick-slip effect. Overall, this work contributes to a better understanding of friction for seismic isolation systems. Since friction is the main source of energy dissipation in such structures, the proposed model will allow a higher accuracy in predicting variables of interest during the dynamic analyses of seismically isolated structures with frictional systems.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.engstruct.2024.118761
dc.identifier.eissn1873-7323
dc.identifier.issn0141-0296
dc.identifier.urihttps://doi.org/10.1016/j.engstruct.2024.118761
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90208
dc.identifier.wosidWOS:001296927900001
dc.language.isoen
dc.revistaEngineering structures
dc.rightsacceso restringido
dc.subjectSeismic Isolation
dc.subjectPolymer tribology
dc.subjectFrictional sliders
dc.subjectFriction Pendulum System
dc.subjectStick-Slip
dc.subjectFriction model
dc.subjectStainless steel
dc.titleDevelopment of a pressure-, velocity-, and acceleration-dependent phenomenological friction model using experimental data of sliding tests between 11 polymers and stainless steel
dc.typeartículo
dc.volumen318
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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