Numerical Lifetime Prediction of Polymer Pipes Taking into Account Residual Stress
In this paper a methodology for assessment of residual stress effects on crack behaviour in the polymer pipe is developed. For simplicitys sake, a linear distribution of residual stresses across the pipe wall is assumed. Linear elastic fracture mechanics is used for the fracture mechanics analysis of the cracked pipe. An approximate relation for the stress intensity factor estimation for a crack in a polymer pipe, with residual stress taken into account is suggested and discussed. The methodology presented can be helpful for a rapid lifetime estimation of polyolefin pipelines.
Alberto Milazzo and Prof. Ferri M.H.Aliabadi
P. Hutař et al., "Numerical Lifetime Prediction of Polymer Pipes Taking into Account Residual Stress", Key Engineering Materials, Vols. 577-578, pp. 169-172, 2014