Finite Element Simulation of Buried Pipeline Crack with Pipe-Soil Friction

Abstract

In order to analyze the effect of pipe-soil friction on crack propagation of buried liquidconveying pipeline, computing methods of friction coefficient between site soil and pipe and iterative solution method of two-way couplings on internal interface of pipe for liquid-structure interaction were introduced. A three dimensional finite element model with parasolid and native method was established, in which friction and fluid-structure boundary for interaction iterative solution was considered. Then, crack of buried liquid-conveying pipeline and effect of pipe-soil friction were analyzed. Results show the optimal friction coefficient, the damage position, and its stress. Also, some advice is proposed for engineering protection.