Effect of overloading on toughness characteristics

0464660 - ÚTAM 2017 RIV SI eng C - Conference Paper (international conference)
Gajdoš, Lubomír - Šperl, Martin - Pařízek, P.
Effect of overloading on toughness characteristics.
DANUBIA Adria Symposium on Advances in Experimental Mechanics (33 ; 2016 ; Portorož). Book of abstracts. Lublaň: SSEM - Slovene Society of Experimental Mechanics, 2016 - (Aulova, A.; Rogelj Ritonja, A.; Emri, I.), s. 80-81. ISBN 978-961-94081-0-0.
[Danubia Adria Symposium on Advances in Experimental Mechanics /33./. Portorož (SI), 20.09.2016-23.09.2016]
R&D Projects: GA TA ČR(CZ) TE02000162
Institutional support: RVO:68378297
Keywords : gas pipelines * overloading * toughness characteristics,
OECD category: Applied mechanics
http://isit.si/das2016/wp-content/uploads/2016/10/DAS33_book_of_abstract_web.pdf

In some cases of pressure tests of gas pipelines plastic strains occur in the pipe wall. The primary aim of the experimental work was to investigate the effect of these strains on both the notch toughness and fracture toughness of a specific test pipe. The pressure overloading was simulated on bands made without straightening of pipe segments, namely by successive removals of metal layers by milling in the tangential direction of the curved segments. Plastic strains ranging from 0.0005 to 0.0011 were obtained by overloading of the bands. Subsequent tests of the notch- and fracture toughness of specimens from overloaded and non-overloaded bands made it possible to assess the effect of plastic strains on fracture properties of the material investigated.
Permanent Link: http://hdl.handle.net/11104/0263471