Pressure pipe damage: Numerical estimation of point load effect II

0434769 - ÚFM 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Majer, Zdeněk - Zouhar, Michal - Ševčík, Martin - Náhlík, Luboš - Hutař, Pavel
Pressure pipe damage: Numerical estimation of point load effect II.
Advances in Fracture and Damage Mechanics XII. Zurich: Trans Tech Publications, 2014 - (Milazzo, A.; Aliabadi, M.), s. 533-536. Key Engineering Materials, 577-578. ISBN 978-3-03785-830-1. ISSN 1013-9826.
[FDM 2013 - International Conference on Fracture and Damage Mechanics /12./. Sardinia (IT), 17.09.2013-19.09.2013]
Institucionální podpora: RVO:68081723
Klíčová slova: polymer pressure pipes * point load * stress intensity factor * lifetime prediction
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

It has been shown that the service lifetime of buried pipes can be reduced especially in relation to stress concentration caused by external point loads. If the pipe is loaded locally the stress is concentrated there and a crack can initiate at this position or the existing crack can be affected by corresponding stress redistribution. In the paper, the effect of a hard indenter, material properties, and the hoop stress level on the stress intensity factor of the axial inner crack are evaluated. A simple relation for estimation of the stress intensity factor value without FEM simulations is proposed.
Trvalý link: http://hdl.handle.net/11104/0238870