Visco-elastic testing-machine of rubber samples with - close stress-strain simulation of car tyre conditions

摘要

The rubber samples are pressed at a certain preload against a temperature probe and loaded by a vibration generator consisting of a frequency generator controlling a vibratior and carrying a regulator for the amplitude of oscillation. A first pickoff on the input records the path of deformation and a second on the output determines the force exerted by the sample. A change-over switch can be used to connect a feed-back circuit either from the first or from the second pickoff to the amplitude regulator.