DEVICE LOADING FAMILY OF SAMPLES WITH CYCLIC BENDING Russian patent published in 1997 - IPC

FIELD: testing of materials. SUBSTANCE: loading of family of samples is carried out by electromagnetic force exciter with two uniaxial A.C. coils inside which permanent magnet in the form of rod is mounted. Ferromagnetic ring spacer is put between their internal faces. Disc ferromagnetic plates are placed on external faces of coils. Length of permanent magnet equals summary length of coils with spacer. Diameters of plates and spacer are equal. Loaded samples are fixed in cantilever in grips arranged over circumference around force exciter with free ends to axis of the latter. Ferromagnetic spacer is positioned in plane of mounting of samples. EFFECT: reduced dimensions of device, enhanced electromagnetic compatibility of force exciter and electric transducers of vibration of samples.