STAND DYNAMIC TESTS OF SPECIMEN Russian patent published in 1995 - IPC

FIELD: strength tests of materials. SUBSTANCE: specimen 7 is accelerated by means of two accelerating devices; each accelerating device has flywheel 4,5 with rotation drive 6, rod 7, 8 and device 9 for pressing the rod to flywheel. Flywheels have different diameters and are mounted on common shaft 14; rods are located in parallel relative to each other. Passive grip 10 for specimen is secured on rod 7; rod 8 is linked with active grip 12 through spring 13. Specimen is loaded by successive impacts due to impact interaction of active grip 12 with weights 3 mounted in guide 2. Since rods have different speeds due to different diameters of flywheels and rod 8 is linked with active grip through spring, smoothly changing load is also created on specimen. EFFECT: proportional change of speeds of smooth and impact loads. 1 dwg