The invention is an apparatus used for measuring flexible material
flexural fatigue, with property of being consisted of
crank block rack mechanism, force and displacement sensor, upper and lower
cartridge, optical plummet centering
system, up-and-down and rotation driving
system and
control circuit, program and
signal collection system, finishing measurement of fixed point
flexural fatigue and relaxation
creep behaviour of flexible material with stationary load and stretch effectively and accurately. The index property measured are endurance failure time, endurance limit strength and limiting strain, relaxation time, sample thickness or
diameter. The apparatus has simple but practical structure, convenient installation and replacement, many tunable parameters containing
sample length, fixed points position and their distance, bending rotational angle and
angular frequency, original load and stretch, accurate measurement, and can avoid influence of move of application point in bending, offset of sample and vibration.