AXIAL-LOADING FATIGUE-TEST FACILITY FOR MATERIAL SPECIMENS Russian patent published in 1995 - IPC

FIELD: test technique. SUBSTANCE: turning on drive 38 mounted on base 1 sets in motion frame 10 through crank disk 39, pusher 40, and slider 41; framecompresses springs 13,16,17 and displaces toothed racks 26,27 through toothed racks 32,33 attached to it and gear wheels 28,29 mounted on base on shafts 30 and 31; this compresses springs 22,23. Specimen 6 is loaded by axial compression and specimens 8,9, by pure bending. In reverse movement of slider 41 frame 10 is held in position by means of electromagnetic retainer 36, and specimens 6,8,9 still take load. When slider 41 actuates switch 34, frame 10 with striker 15 is released from retainers 36 and imparts impact compression to specimen 7 under the action of forces of all power springs while specimens 6,8,9 are unloaded. After that specimens are loaded again. EFFECT: improved capacity due to increased number of specimens tested simultaneously; enlarged functional capabilities due to simultaneous deformation of specimens under various loads. 1 dwg