MEASURING INSTRUMENT OF FATIGUE CRACK GROWTH RATE OF RUBBERY MATERIALS AND ITS METHOD THEREOF

摘要

The present invention experimentally relates to a test apparatus and the measurement method of measuring, and more particularly, the the process of fatigue crack growth of the rubber materials - a thermostat that maintains constant the pure shear specimens fixed in the lower clamp experiment temperature under a variety of atmospheric conditions within a device for experimental measurement to the length that the crack growth while varying the time period and size of the transformation cycle repeated for a long time variant hayeoteul. The measuring device is equipped with a high-speed optical CCD camera to automatically measure more precisely the process of growth of a crack in real-time, strain magnitude and variations repetition period is a linear servo (SERVO) controlled through a hydraulic device or a screw to the cam drum shaft in and adjusted by controlling the number of revolutions of the servo (sERVO) motor to move to a center of the rotating shaft by mounting, to evaluate the influence of the atmosphere on the thermostat within the experimental temperature, nitrogen, or ozone fatigue crack growth behavior through the atmospheric conditions change, such as . ; Rubber, rubber compound, the fatigue crack growth testing, fatigue crack growth rate, the modified cycle, strain, temperature, nitrogen, ozone, high-speed optical CCD camera, non-relaxed, strain energy density, the heat energy