A description of local material properties close to a butt weld

0434874 - ÚFM 2015 RIV CH eng C - Conference Paper (international conference)
Hutař, Pavel - Ševčík, Martin - Lach, R. - Knésl, Zdeněk - Náhlík, Luboš - Grellmann, W.
A description of local material properties close to a butt weld.
Local Mechanical Properties IX. Zurich: Trans Tech Publications, 2014 - (Pešek, L.; Zubko, P.), s. 146-149. Key Engineering Materials, 586. ISBN 978-3-03785-876-9. ISSN 1013-9826.
[LMP 2012 International Conference on Local Mechanical Properties /9./. Levoča (SK), 07.11.2012-09.11.2012]
R&D Projects: GA MŠMT(CZ) EE2.3.30.0063; GA MŠMT(CZ) ED1.1.00/02.0068; GA ČR(CZ) GAP108/12/1560
Institutional support: RVO:68081723
Keywords : polymer butt weld * microindentation * numerical modelling * lifetime estimation
Subject RIV: JL - Materials Fatigue, Friction Mechanics

The paper presents a methodology for the lifetime assessment of welded polymer pipes. A fracture mechanics analysis of a butt-welded joint is performed by simulating radial crack growth in the inhomogeneous region of the pipe weld. It was found that the presence of material inhomogeneity in the pipe weld caused by the welding procedure leads to an increase in the stress intensity factor of the radial crack and changes the usual failure mode of the pipe system. This can lead to a significant reduction in the lifetime of the pipe system.
Permanent Link: http://hdl.handle.net/11104/0238851