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Title of the article An estimation of crack growth life for the tubes of linear part of the oil pipeline with the longitudinal semielliptical crack after long time operation
Authors

Veselukha V.M., Graduate Student, Lecturer YO "Grodno State University n.a. Ya. Kupala", Lida, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

Shishkin A.E., Ph.D. in Technical Science, Lecturer of Lida College of YO "Grodno State University n.a. Ya. Kupala", Lida, Republic of Belarus

Bogdanovich A.V., Doctor of Technical Sciences, Associate Professor, Professor of the Department "Technical Mechanics", YO "Grodno State University n.a. Ya. Kupala", Lida, Republic of Belarus
In the section TECHNOLOGICAL MECHANICS
Year 2014 Issue 3 Pages 53-58
Type of article RAR Index UDK 539.4 Index BBK  
Abstract To determine the crack growth resistance of tubes made of ductile steel using of approaches of linear elastic fracture mechanics it is incorrectly due to non-compliance with the conditions of plane strain. One of the variants of solutions to the problem lies in the extrapolation formulas for linear elastic fracture mechanics for stress intensity factor at a substantially nonlinear stage of deformation using functions amendments of the plasticity. The results of the cyclic crack growth resistance tests for samples made of tube steel on the basis of a new engineering-stock approach are given. The evaluation of crack growth life for tubes of linear part of the pipeline in the presence of dangerous longitudinal semi-elliptical crack at a given level of irregular operational loading and taking into account long-term (over 30 years) exposure to damaging factors are carried out.
Keywords crach resistance, life of tube, ductile steel, oil pipeline, long timeoperation, stress intensity factor, tightening, compact specimen, irregular loading
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