Paper Title:
The Effect of Polymer Pipe Weld Geometry on Creep Lifetime
  Abstract

In the case of large diameter polyethylene (PE) and polypropylene (PP) pipes the most usual joint is the butt weld. This paper focuses on the influence of a weld bead on the service life of welded pipes from a fracture mechanics perspective. To this aim the stress concentrator created by the connection between the weld bead and the pipe’s free surface is modelled as a notch. Global parameters defining properties of stress and strain field in the notch region are calculated for materials with a prevailing Norton-type creep. It is demonstrated that in the case of creep loading conditions and ductile failure mode the existence of such stress concentrators has no negative influence on the lifetime of pipes.

  Info
Periodical
Edited by
Pavel Šandera
Pages
175-178
DOI
10.4028/www.scientific.net/KEM.465.175
Citation
M. Ševčík, Z. Knésl, P. Hutař, L. Náhlík, "The Effect of Polymer Pipe Weld Geometry on Creep Lifetime", Key Engineering Materials, Vol. 465, pp. 175-178, 2011
Online since
January 2011
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Price
$32.00
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