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Influence of wall thickness on the creep rupture performance of polyethylene pipe
Author(s) -
Krishnaswamy Rajendra K.
Publication year - 2007
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20729
Subject(s) - materials science , creep , composite material , brittleness , polyethylene , residual stress , temperature gradient , fracture (geology) , fabrication , medicine , physics , alternative medicine , pathology , quantum mechanics
A thermal gradient is inherent to the solidification of extruded profiles such as pipes. Depending on the magnitude of the gradient, varying levels of residual stresses are frozen‐in during the pipe fabrication step. In this investigation, the residual stress state of a polyethylene (PE) pipe was altered by changing its wall thickness. Creep rupture testing of the subject pipes of varying wall thickness provided an insight on how residual stresses influences both ductile and brittle fracture processes. POLYM. ENG. SCI., 47:516–521, 2007. © 2007 Society of Plastics Engineers.