Variation of frictional strength in precut foam rubber, with implications for slip instability
AuthorSlater, Catherine F
Geological Sciences & Engineering
StatisticsView Usage Statistics
Foam rubber is useful for modelling earthquakes and stick-slip, chattering that occurs readily in foam rubber and is controlled by friction weakening and stiffness. This study investigates frictional parameters and variable friction potentially causing stick-slip. The best friction coefficient for foam rubber is: friction over normal load to the two-thirds power. Increasing the system stiffness sufficiently enabled smooth sliding. In these experiments, contact time has no effect on static friction. However, peak friction increases during a second sliding interval from asperities interlocking. Friction also significantly increases inversely with load rate, with effects amplified by dynamic conditions. No negative friction-velocity relation is exhibited. Rather, the curve increases rapidly then remains constant over velocities corresponding to stick-slip events. Displacement weakening (demonstrated when asperities interlock) and load rate may cause stick-slip in foam rubber, but pot velocity or contact time.
Online access for this thesis was created in part with support from the Institute of Museum and Library Services (IMLS) administered by the Nevada State Library, Archives and Public Records through the Library Services and Technology Act (LSTA). To obtain a high quality image or document please contact the DeLaMare Library at https://unr.libanswers.com/ or call: 775-784-6945.
second sliding interval
negative friction--velocity relation
Showing items related by title, author, creator and subject.
Konduri, Indu Mohan (University of Nevada, Reno, 1994)Airflow over rough surfaces in underground mining applications was studied. Two sections of an underground airway were laser-profiled for analysis in order to determine the impact of the surface measurement method of the ...
Cernoch, Barry Michael (University of Nevada, Reno, 1991)Two analytical methods are used to characterize surface roughness of sixteen samples of Topopah Spring welded Tuff. Testing and analysis produced reliable JRC values and fractal dimensions for each sample.
Priestley, Keith Ferrin (University of Nevada, Reno, 1974)Strains of tidal origin and long-period tectonic origin observed at two sites in central Nevada are discussed and compared with strain observations in other areas of the western United States. The solid earth tides are the ...