METHOD TO DETERMINE STIFFNESS OF EASILY DEFORMED COMPOSITE MATERIALS Russian patent published in 2014 - IPC G01N29/04 

FIELD: testing equipment.

SUBSTANCE: invention relates to equipment of tests and measurements, namely, to the method for determination of stiffness of easily deformed composite, preferably tanning and textile, materials and other fibre systems, and may be used in light industry. Substance: as the informative parameter, they use the value of the resonant second frequency of the measured sample, which is determined by excitation of forced transverse oscillations in the sample with the frequency of 0.1-20 Hz. The quasi-resonant spectrum of internal frequencies is recorded for the sample with its transfer to the memory of the processor. The parameter of material stiffness with the help of the processor is calculated using the formula, and the produced results are stored as a data base on the electronic medium.

EFFECT: expansion of technological capabilities of the method, increased accuracy and provision of the possibility to form an electronic data base containing parameters of stiffness for different materials, simultaneously with determination of stiffness.

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