Improving the fatigue strength of impaired welds by overloading

0480650 - ÚTAM 2018 RIV IT eng C - Konferenční příspěvek (zahraniční konf.)
Gajdoš, Lubomír - Šperl, Martin - Burgos Braga, A.
Improving the fatigue strength of impaired welds by overloading.
34th Danubia-Adria Symposium on Advances in Experimental Mechanics. Trieste: EUT Edizioni Universita di Trieste, 2017 - (Cosmi, F.). ISBN 978-88-8303-863-1.
[Danubia-Adria Symposium on Advances in Experimental Mechanics /34./. Trieste (IT), 19.09.2017-22.09.2017]
Grant CEP: GA TA ČR(CZ) TE02000162
Institucionální podpora: RVO:68378297
Klíčová slova: defects * gas pipeline * fatigue
Obor OECD: Audio engineering, reliability analysis
http://hdl.handle.net/10077/15556

The defects in the weld can be defined as irregularities in the weld metal produced due to incorrect welding parameters or wrong welding procedures or wrong combination of filler metal and parent metal. Various welding defects can be classified into groups such as cracks, porosity, solid inclusions, lack of fusion and inadequate penetration, imperfect shape and miscellaneous defects. A lack of root fusion (LRF) is one of the weld defects which may develop to a crack and cause failure of the gas pipeline. They also reduce the fatigue limit. In order to investigate the positive effect of overloading of welded joints with LRF on their fatigue properties fatigue tests were carried out on strip-type specimens taken from a helically welded pipe ø 630/7 mm made from low-C steel ČSN 411373.
Trvalý link: http://hdl.handle.net/11104/0276379