Author(s): R. Frederking; A. Barker
Linked Author(s):
Keywords: No Keywords
Abstract: A versatile friction test apparatus has been built and used at the National Research Council of Canada. It is based on using the towing carriage in an ice tank and a specially designed hydraulic loading system, thereby allowing easy variation of test speed and normal loading. Tests of friction of sea ice were done on large samples of smooth concrete, rough concrete, painted steel, corroded steel and wood laid out on the floor of the ice tank. Extensive instrumentation measured forces and accelerations in 3directions, speed and abrasion of the ice. Test variables included speed, 10 mm/s to700 mm/s; temperature, –2°C to–10°C; and normal pressure, 30 kPa to 130 kPa. Speed and specimen roughness had the strongest influence, with the friction coefficient almost doubling as speed decreased from 100 mm/s to 10 mm/s. Temperature and pressure had little influence. Considerable variability in friction coefficient values over a single test sample was observed, a coefficient of variation of 0.25 being typical for most samples.
Year: 2002