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Evaluation the Effect of Residual Stress on Fracture of Polyethylene Pipe under Pressure Loading | ||
| Basrah Journal for Engineering Science | ||
| Article 1, Volume 16, Issue 2, 2016, Pages 71-78 PDF (0 K) | ||
| Author | ||
| Haider Hadi Jasim | ||
| Abstract | ||
| In this paper, the Weibull uni-axial and multi-axial the distribution function for polyethylene pipes under pressure loading were developed and analyzed taking account of residual stress. The tensile test was achieved to determine mechanical properties and the Weibull parameters. An experimental method using the hole drilling strain-gage method was used to measure the residual stresses in PE pipe and compare with that obtained from numerical finite element method (FEM). The obtained results show that there is a convergence between uni-axial and multi-axial distribution function, but multi-axial distribution function give large values compared to the uni-axial distribution function. It was observed that the residual stresses have influence on failure assessment diagram and cause translation from elastic-plastic failure to brittle failure. | ||
| Keywords | ||
| Probability of failure; Weibull parameters; FAD diagram; Residual stress; cracks | ||
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