The capabilities of the nondestructive ultrasonic method for evaluating stresses are demonstrated by an example of measuring non-design axial stresses in technological pipelines. The results of applying the acoustoelasticity effect, which was implemented in an IN-5101A device, obtained in direct in situ measurements of mechanical stresses in piping structures of the main equipment of compressor stations are presented. The features of applying the acoustoelasticity method for measuring stresses in these objects and its prospects for solving the problem of periodic testing of a stressed state of pipeline systems are considered. The possibility of applying the nonzero ultrasonic strain gauging for determining a stress state of working objects has been experimentally confirmed by an example of measuring axial stresses in technological pipelines of CSs. The method has good prospects for measuring stresses in seamless pipes that are not manufactured using rolled sheets, which frequently possess a high degree of intrinsic acoustic anisotropy. The method can be also used for other objects whose materials have an intrinsic acoustic anisotropy no higher than 0.1 %, and it is possible to test an analogous material in the unstressed state.
Application of the acoustoelasticity phenomenon in studying stress states in technological pipelines
Anwendung des akustoelastischen Phänomens bei der Untersuchung des Spannungszustandes in technologischen Pipelines
Russian Journal of Nondestructive Testing ; 45 , 12 ; 861-866
2009
6 Seiten, 4 Bilder, 1 Tabelle, 17 Quellen
Article (Journal)
English
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