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Frictional characteristics of Teflon–steel interfaces under dynamic conditions
Author(s) -
Constantinou M. C.,
Caccese John,
Harris Harry G.
Publication year - 1987
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290150607
Subject(s) - acceleration , materials science , excitation , composite material , bearing (navigation) , surface finish , surface roughness , structural engineering , engineering , electrical engineering , physics , classical mechanics , astronomy
An experimental study to assess the frictional characteristics of Teflon–steel interfaces under dynamic conditions is described. Tests were conducted on unfilled Teflon sliding on stainless steel polished to a surface roughness of less than 0.05 μm CLA. The bearing pressure was 1.38, 3.45 and 6.9 N/mm 2 , the frequency of sliding was 0.5 and 1 Hz and the acceleration of excitation, imposed by a small shaking table, was between 0.05 and 0.5 g . It was found that friction drops with decreases in the acceleration of excitation and drops with increases in the bearing pressure. It was observed that Teflon–steel interfaces have the tendency to slide continuously regardless of the value of acceleration. This is very important in base isolation applications because it prevents high frequency input to the structure.