Keyword: «stress intensity coefficient»

The paper considers the possibility of using a local low-temperature loading method during acoustic emission control of hazardous production facilities in order to establish the degree of danger of crack-like defects. This method is based on the creation of a local stress-strain state, realized by the effect of a gradient temperature field on an object using carbon dioxide in the form of "dry snow". Signals from acts of acoustic emissions emanating from the top of an artificially applied crack on a thin-sheet plate were processed and investigated. The theoretical values of the stress intensity coefficient for a defect under the influence of local low-temperature loading are calculated. It is shown that with a local low-temperature loading method, a power-law dependence of the number of acoustic emission acts on the stress intensity coefficient is observed.

The paper considers the possibility of using local low-temperature loading during AE control. This method is based on the creation of a local stress-strain state, which is formed when a gradient temperature field is applied to an object using carbon dioxide in the form of "dry snow". Signals from acts of acoustic emissions emanating from the tip of an artificially applied crack on a thin-walled plate were processed and investigated. Theoretical values of the stress intensity coefficient for a defect under local low-temperature loading are calculated. It is shown that with the method of local low-temperature loading, a power dependence of the number of acts on the stress intensity coefficient is observed.