PLANT FOR FATIGUE TESTING OF SAMPLES UNDER COMPLEX STRESSED CONDITION Russian patent published in 2013 - IPC G01N3/20 

FIELD: testing equipment.

SUBSTANCE: plant for fatigue testing of samples under complex stressed condition comprises two motors of different capacity with parallel shafts and opposite rotation torques, two levers, some ends of which are connected to a shaft of the appropriate motor, grips for a sample, one of which is installed at the end of the first lever, an electromagnetic coil connected with the second lever, and an anchor installed as capable of interaction with the second grip. At the same time the plant has a body of a dielectric material with a hole, hingedly connected with the end of the second lever, a pusher of a dielectric material, arranged in the hole of the body as capable of displacement along the axis of the hole and rotation relative to the axis, and additional electromagnetic coils, besides, electromagnetic coils are arranged along a helical line on the inner surface of the body. The anchor is installed on the pusher eccentrically relative to the axis of rotation with the possibility of serial interaction with coils. The second grip is fixed at the end of the pusher, and electromagnetic coils are made as capable of individual control of an interaction force with an anchor.

EFFECT: increased information value of fatigue tests under action of axial and bending loads with additional action of cyclic twisting load with the possibility to change form of cycles and levels of loads in process of testing.

2 cl, 1 dwg