метод магнитоанизотропии, разность главных механических напряжений (ргмн), локальные участки, модуль градиента ргмн, цикличность нагружения, стенд для испытаний, Nuclear engineering. Atomic power, TK9001-9401

As part of the experimental assessment of the stress-strain state of the NPP pipeline elements using devices based on the magnetic anisotropic method, changes in the wall thickness of the local section of the pipeline sample and the difference in the main mechanical stresses are obtained and evaluated. The analysis of changes in the data characterizing the stress-strain state, such as: the main mechanical stresses, the first partial derivative of the main mechanical stresses with respect to the annular generator of the sample, the modulus of the gradient of the main mechanical stresses, indicates the presence of three zones characterizing different of the studied area of the full-scale sample of the pipeline during the experiment as the local zone is thinned.