METHOD OF INSPECTING QUALITY OF SAMPLE MATERIAL BY ACOUSTIC EMISSION Russian patent published in 2013 - IPC G01N29/14 

FIELD: physics.

SUBSTANCE: sample is subjected to thermal action with rising temperature and resultant acoustic emission signals in the sample are detected, wherein the thermal action is applied to a series of same-type samples made from the same material to temperature of 90°C and for each sample, the average value of acoustic emission activity in the 30-90°C range is determined; each of the series of samples is subjected to monoaxial mechanical loading, results of which are used to determine its ultimate compression strength; a calibration curve is plotted, which describes the relationship between the average acoustic emission activity and the ultimate compression strength of the material for the entire series of test samples, from which strength of the material of retested samples of the same type is determined from their average thermoacoustic emission activity in the range from 30°C to 90°C.

EFFECT: enabling determination of the ultimate strength of hard rock samples without destruction thereof.

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