0434713 - ÚFM 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Ševčík, Martin - Poduška, Jan - Náhlík, Luboš - Kučera, J. - Hutař, Pavel
Inaccuracy in Residual Stress Estimation and Its Influence on the Residual Lifetime of Polymer Pipe.
Materials Structure and Micromechanics of Fracture VII. Zurich: Trans Tech Publications, 2014 - (Šandera, P.), s. 165-168. Key Engineering Materials, 592-593. ISBN 978-3-03785-934-6. ISSN 1013-9826.
[MSMF 7 - International Conference on Materials Structure & Micromechanics of Fracture /7./. Brno (CZ), 01.07.2013-03.07.2013]
Grant CEP: GA MŠMT(CZ) EE2.3.30.0063; GA MŠMT(CZ) ED1.1.00/02.0068; GA ČR(CZ) GAP108/12/1560
Institucionální podpora: RVO:68081723
Klíčová slova: residual stress * polymer pipe * slow crack growth * lifetime estimation
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
DOI: https://doi.org/10.4028/www.scientific.net/KEM.592-593.165

This paper presents a methodology suitable for estimation of residual lifetime of polymer pipes. The linear and non-linear distribution of residual stresses in the pipe wall is studied using FEM analysis. The approximate relation for the stress intensity factor calculation is presented. It is shown that the presented relation gives a stress intensity factor similar to the FEM analysis for the linear or non-linear distribution of residual stress. The suggested procedure produces a slightly conservative lifetime estimation where the accuracy of the procedure increases with increasing ratio between applied internal pressure level to residual stress level. The accuracy of the residual stress estimation and corresponding stress intensity factor is discussed and a final recommendation for lifetime determination based on simplified methodology is given.
Trvalý link: http://hdl.handle.net/11104/0238700