A parametric study on the mechanical performance of buried X65 steel pipelines under subsurface detonation

摘要: Abstract Existing studies on the response of buried steel pipelines to explosion generally concern finding safe distance where pipeline does not undergo plastic deformation while intentional explosions impose intense deformations pipelines. In order address this gap, present investigation is carried out numerically dealing with API 5L grade X65 a nearby sever due sabotage or war. Furthermore, effects diameter-to-thickness ratio and internal pressure were investigated numerically. A combined Eulerian–Lagrangian (CEL) method was adopted develop full-coupled 3D finite element model. Employing simplified Johnson-Cook material model simulate mechanical behavior considering air in increased simulation accuracy. The results from study compared those recent investigations good agreements observed. show that, amount consequently value maximum equivalent strain decrease either increase operating ratio; however, effect far more than ratio. obtained can be used for improvement protective design