Effect of Mechanical Properties on Tensile Strain Limit for Leakage of High-Pressure Pipe with Surface Crack

摘要

The tensile strain limit for leakage of high-pressure pipe with a circumferential surface notch is simulated by FE-analysis based on the proposed damage evolution models, and compared with the experimental results. In this paper, it is demonstrated that the simulation model can be applicable to predicting ductile crack growth behaviors of a circumferentially notched pipe with internal high pressure subjected to tensile loading. This result implies the limit for leakage of high-pressure pipe subjected to tensile strain can be quantitatively related to the material properties with respect to 2 types of ductile properties. The parametric simulation provides the guideline to improve the tensile strain limit for leakage from the mechanical properties' point of view.