The influence of the time dependence of grease behavior was studied. In using rheometer experiments an interpretation of the obtained flow curves is given. A parameter for the description of the structural degradation, the limiting energy density, is quantified and compared for different temperatures. Also, the deformation properties of some greases were investigated from the viewpoint of time dependence. Finally, for the state of maximum degradation, the friction coefficient is estimated.
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Erik Kuhn (1998) studied this question.
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