Počet záznamů: 1  

On crack propagation in the welded polyolefin pipes with and without the presence of weld beads

  1. 1.
    0451977 - ÚFM 2016 RIV GB eng J - Článek v odborném periodiku
    Mikula, Jakub - Hutař, Pavel - Nezbedová, E. - Lach, R. - Arbeiter, F. - Ševčík, Martin - Pinter, G. - Grellmann, W. - Náhlík, Luboš
    On crack propagation in the welded polyolefin pipes with and without the presence of weld beads.
    Materials and Design. Roč. 87, DEC (2015), s. 95-104. ISSN 0264-1275. E-ISSN 1873-4197
    Grant CEP: GA ČR(CZ) GAP108/12/1560; GA MŠMT(CZ) EE2.3.30.0063; GA MŠMT(CZ) ED1.1.00/02.0068
    Institucionální podpora: RVO:68081723
    Klíčová slova: Slow crack growth * Butt weld * Lifetime estimation * Polyolefin pipes * Weld bead
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika
    Impakt faktor: 3.997, rok: 2015

    The main aim of the paper is to study the influence of both material inhomogeneity and weld bead geometry on crack propagation in welded polyolefin pipes. Axially and circumferentially oriented cracks are studied and the stress intensity factors are compared considering different positions of the cracks. Two cases of the welded pipe system are compared, one considering the optimal weld bead geometry and the other one considering the geometry after removing the weld bead once the welding process is finished. In both cases the inhomogeneous distribution of material properties inside the welded region is considered. The results show that the weld might have a negative effect on the lifetime especially when the weld bead is removed. Though the weld bead increases the stress concentration near the notches due to which a circumferential crack may appear the resulting lifetime is still comparable to that of an axial crack propagating in a homogeneous pipe.
    Trvalý link: http://hdl.handle.net/11104/0253177

     
     
Počet záznamů: 1  

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