METHOD FOR FIXING SURFACE STRAIN IN THE DETERMINATION OF INTERNAL discontinuities sealing materials in a multicyclic loading

摘要

Method fixation surface deformations in determining the occurrence of internal discontinuities sealing material under multicycle loadings, characterized in that the surface of the sealant sample containing fine ferromagnetic powder, providing registration change in the resonant frequency of the circuit, further coated a fluorescent layer on the change in the brightness is caused by deformations bases, and fixed by the DVR high resolution, synchronized th time with the change of the resonant frequency of the circuit is set the stress-strain state of a sealant sample.