Abstract
In this report influence of material parameters on dynamic friction characteristics of paper-based wet friction material was investigated experimentally. Dynamic friction characteristics were represented in the form of complex friction coefficient which was defined as frequency response function of friction force with respect to normal force. As a result of experiments the tendency that amplitude of complex friction coefficient and its phase angle decreased with the increase of exciting frequency became more significant when the dimension of square surface was larger or the compressive modulus was lower. This was considered because the flow resistance of the internal lubricant inside the paper-based friction material became larger in those conditions and because the simultaneous pressure rise made the solid contact relaxed and delayed.
