|
| Analysis of burst pressure for corroded pipeline with double-mean approximation yield criterion |
| Received:October 15, 2020 Revised:January 07, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201015001 |
| KeyWord:corroded pipeline yield criterion burst pressure yield-to-tensile strength ratio strain hardening exponent |
| Author | Institution |
| 邓磊 |
苏州大学 沙钢钢铁学院, 苏州 |
| 章顺虎 |
苏州大学 沙钢钢铁学院, 苏州 |
| 覃诗卉 |
苏州大学 沙钢钢铁学院, 苏州 |
| 刘欣滢 |
苏州大学 沙钢钢铁学院, 苏州 |
|
| Hits: 587 |
| Download times: 213 |
| Abstract: |
| A linear yield criterion,called the double-mean approximation yield criterion,is established by simultaneously approximating the average values of the yield lengths and the apothems of the Tresca and TSS yield criteria.The yield locus of the proposed yield criterion on the π-plane is an equilateral and non-equilateral dodecagon which locates inside the von Mises circle.Based on the present yield criterion,the plastic limit analysis of a pipeline with a corrosion defect under inner pressure is analyzed,and an analytical solution of the burst pressure is derived.The analytical solution is a function of the yield-to-tensile strength ratio (σY/σT),the original thickness-to-diameter ratio (t0/D0),the tensile strength as well as defect depth ratio (d0/t0).After comparison,it is found that the predicted burst pressure is close to the simulated and experimental data.The quantitative analysis shows that the burst pressure increases with the yield-to-tensile strength ratio or the original thickness-to-diameter ratio,but decreases with the defect depth ratio.The present solution of the burst pressure is significant in the material selection,design and evaluation of the pipeline. |
|
|
|