INSTALLATION FOR FATIGUE TESTING SAMPLES Russian patent published in 2010 - IPC G01N3/32 

FIELD: physics.

SUBSTANCE: installation for fatigue testing samples has a base fitted with an actuator for reciprocal motion in form of an eccentric with a rotary actuator, frames for holding the eccentric and a pusher joined to the frame; two coaxial sample gripping devices whose axis is parallel the axis of the pusher, two levers hinged at one end to the pusher, and at the other to the respective gripping device; a swing lock for one of the levers fitted on the pusher; a pair of inertial loads interacting with the gripping devices and joined to each other by a tension rod. According to the invention, the eccentric is connected to an additional actuator for changing eccentricity, and there are additional pairs of loads on the base joined to each other by tension rods and designed fro interacting with the gripping devices. Each pair of loads is fitted with a gap from other pairs.

EFFECT: increased information content due to possibility of testing with alternation of axial and shearing loads with change of their value with or without change of cycle frequency during non-incremental or incremental loading.

1 dwg, 2 cl