Crack behavior in a welded polyolefin pipe

0370352 - ÚFM 2012 RIV LV eng J - Článek v odborném periodiku
Ševčík, Martin - Hutař, Pavel - Náhlík, Luboš
Crack behavior in a welded polyolefin pipe.
Mechanics of Composite Materials. Roč. 47, č. 3 (2011), s. 263-270. ISSN 0191-5665. E-ISSN 1573-8922
Grant CEP: GA ČR GD106/09/H035; GA ČR GC101/09/J027
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: fracture mechanics * polyolefin pipe * polymer weld * stress intensity factor * graded structure
Kód oboru RIV: JL - Únava materiálu a lomová mechanika
Impakt faktor: 0.409, rok: 2011

A three-dimensional model of a pressured polymer pipe with a weld is created in order to estimate the stress intensity factor for a crack located inside the weld. A comparison with values obtained for an edge-cracked tension specimen, usually employed for an experimental determination of weld properties, is performed. The difference between the stress intensity factor in a homogeneous pipe and the results taking into account the changes in material properties inside the weld is presented. A conservative and easily applicable relationship for calculating the stress intensity factor in a pipe weld is proposed.
Trvalý link: http://hdl.handle.net/11104/0204185