By a mechanical flattening test with an analysis of acoustic emission signals

摘要

FIELD: measurement equipment.;SUBSTANCE: method for mechanical testing of pipes includes flattening of a pipe sample between two flat rigid parallel planes with permanent speed, determination of extent of plasticity and deformation of the sample by compression until the first crack appears in it. At the same time the sample is deformed with registration of acoustic emission signals by the sensor of acoustic emission fixed on the sample. The moment of crack formation is determined by sharp increase of the acoustic emission signal, according to which the extent of plasticity is determined, as well as the sample plasticity stock as relative exceeding of sample plasticity of the previously established limits.;EFFECT: improved accuracy of measurements.;2 dwg