A numerical methodology for lifetime estimation of HDPE pressure pipes

0370344 - ÚFM 2012 RIV GB eng J - Článek v odborném periodiku
Hutař, Pavel - Ševčík, Martin - Náhlík, Luboš - Pinter, G. - Frank, A. - Mitev, I.
A numerical methodology for lifetime estimation of HDPE pressure pipes.
Engineering Fracture Mechanics. Roč. 78, č. 17 (2011), s. 3049-3058. ISSN 0013-7944. E-ISSN 1873-7315
Grant CEP: GA ČR GA106/09/0279; GA ČR GC101/09/J027
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: time to failure curve * fracture mechanics * PE pipes * creep crack growth * lifetime estimation
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
Impakt faktor: 1.353, rok: 2011

Using linear elastic fracture mechanics a new methodology for a lifetime assessment of internally pressurized polymer pipes was developed. The concept is based on the numerical calculation of stress intensity factors for pipes under different loading conditions in combination with experimentally determined creep crack growth kinetics. Comparison of simulated lifetimes with experimental data from tests of internally pressurized pipes proved the principal applicability of the concept suggested. Major parameters affecting the pipe lifetime are identified and discussed. Combination of the creep crack growth tests and numerical simulations can be a very powerful tool for lifetime estimation of plastic pipes under different loading conditions.
Trvalý link: http://hdl.handle.net/11104/0204178