Thermal imaging on simulated faults during frictional sliding

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dc.creatorMair, Karen
dc.creatorRenard, François
dc.creatorGundersen, Olav
dc.date2008-01-03
dc.date.accessioned2026-07-07T08:52:17Z
dc.date.available2026-07-07T08:52:17Z
dc.descriptionHeating during frictional sliding is a major component of the energy budget of earthquakes and represents a potential weakening mechanism. It is therefore important to investigate how heat dissipates during sliding on simulated faults. We present results from laboratory friction experiments where a halite (NaCl) slider held under constant load is dragged across a coarse substrate. Surface evolution and frictional resistance are recorded. Heat emission at the sliding surface is monitored using an infra-red camera. We demonstrate a link between plastic deformations of halite and enhanced heating characterized by transient localized heat spots. When sand 'gouge' is added to the interface, heating is more diffuse. Importantly, when strong asperities concentrate deformation, significantly more heat is produced locally. In natural faults such regions could be nucleation patches for melt production and hence potentially initiate weakening during earthquakes at much smaller sliding velocities or shear stress than previously thought.
dc.identifierhttps://arxiv.org/abs/0801.0479
dc.identifierhttp://arxiv.org/abs/0801.0479
dc.identifierGeophysical Research Letters 33 (2006) L19301
dc.identifierdoi:10.1029/2006GL027143
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/145232
dc.subjectGeophysics
dc.titleThermal imaging on simulated faults during frictional sliding
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