Authors: JaeJun Han HoWan Ryu YunJae Kim JongSung Kim YoungJin Oh HeungBae Park
Publish Date: 2014/12/12
Volume: 28, Issue: 12, Pages: 4929-4938
Abstract
This paper presents an analysis of failure assessment diagram for PE4710 grade high density polyethylene pipes which are recently concerned to use in the nuclear industry Available test data of tensile single edge notched tension specimens and pressurised pipes are summarised and suitably characterised for use in the failure assessment diagram in R6 procedure Critical crack lengths and failure mode for the pressurised pipes and single edge notched tension specimens are determined under sustained load and compared with test results Based on the concept of linear elastic fracture mechanics a slow crack growth rate of PE4710 at 95°C is obtained excluding crack initiation time To consider the effect of temperature on slow crack growth rate a shift method is introduced Remaining life is calculated against the crack margin and compared with the failure timeJaeJun Han is a PhD candidate of the Mechanical Engineering at Korea University He received a BS degree in 2008 from Korea University His research interests are in applying the current structural integrity assessment procedure and developing the procedure based on fracture mechanics and computational structural analysisYunJae Kim is a Professor of the Mechanical Engineering at Korea University and a visiting Professor at Imperial College London He received the PhD in 1993 from Massachusetts Institute of Technology USA His current research covers computational structural analysis methods of components and developing micromechanical models of damage and fracture for structural integrity applications
Keywords: