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Numerical Modelling of Creep Fracture Behaviour of Medium Density Polyethylene (MDPE)
Last modified: 2013-05-06
Abstract
The application of the reference stress method (RSM) to estimate the J and C*
integrals of cracked thick-walled metal as well as medium density polyethylene
(MDPE) pipes is investigated. Unlike the existing solutions, the newly developed
analytical approximations of the plastic limit pressure and J-integral are
applicable to a wide range of crack dimensions in metal pipes. Based on the
experimental data from literature and analogy between plasticity and creep, the
paper discusses a method used to develop the efficient computational strategy for
modeling creep fracture mechanisms by slow crack growth in a MDPE pipes.
integrals of cracked thick-walled metal as well as medium density polyethylene
(MDPE) pipes is investigated. Unlike the existing solutions, the newly developed
analytical approximations of the plastic limit pressure and J-integral are
applicable to a wide range of crack dimensions in metal pipes. Based on the
experimental data from literature and analogy between plasticity and creep, the
paper discusses a method used to develop the efficient computational strategy for
modeling creep fracture mechanisms by slow crack growth in a MDPE pipes.
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