A modified strain-controlled reference stress approach for submarine pipelines under large-scale plastic strain

作者：Zhao Xiaoxin; Xu Lianyong^*; Jing Hongyang; Zhao Lei; Huang Jiangzhong

来源：Advances in Engineering Software, 2018, 119: 12-20.

DOI：10.1016/j.advengsoft.2018.01.010

• Reel-lay
• gamma factor
• ECA
• Submarine pipelines
• Empirical formula
• Strain-controlled boundary conditions

The reel-lay approach is widely applied in submarine pipelines. During the process of reeling and unreeling, pipelines are subjected to nominal strain of 1-4%. In this study, various pipeline geometries and crack dimensions were calculated using a finite element analysis and analytical solution under strain-controlled boundary conditions. A modified reference stress approach was applied under strain-controlled boundary conditions using a derived implicit analytical solution of the nominal stress. The limit load solution was modified through a. factor based on the finite element analysis under strain-controlled boundary conditions. A regression analysis of. was conducted and an empirical formula was determined. The modified strain-controlled reference approach is in contrast to other ECA methods and proved to be closer to the finite element analysis results.

• 出版日期2018-5
• 单位天津大学