Pipe Element Abaqus - Opened End

[GersiB]

Hello,

I am using PIPE element in Abaqus to model a straight pipeline subjected to internal pressure. Abaqus considers by default the pipeline to be closed at its ends, so it results in longitudinal stresses and strains. I need to model this pipeline with OPENED ENDS. Could anyone suggest me how can I do it?

Thank you in advance for your help!

 

[ShellsPlatesMeshes]

You might want to use some customized software for that problem. Here is an example; perhaps that looks similar to the problem you are solving:

http://members.ozemail.com.au/~comecau/quad_shell_wtank_ir.htm

 

[StefCon]

Hi,

Could this be what you are looking for? I haven't used those elements myself so there might be some other solution too.

Link

"Pressure on pipe and elbow elements
You can specify external pressure, internal pressure, external hydrostatic pressure, or internal hydrostatic pressure on pipe or elbow elements. When pressure loads are applied, the effective outer or inner diameter must be specified in the element-based distributed load definition.

The loads resulting from the pressure on the ends of the element are included: Abaqus assumes a closed-end condition. Closed-end conditions correctly model the loading at pipe intersections, tight bends, corners, and cross-section changes; in straight sections and smooth bends the end loads of adjacent elements cancel each other precisely. If an open-end condition is to be modeled, a compensating point load should be added at the open end. A case where such an end load must be applied occurs if a pressurized pipe is modeled with a mixture of pipe and beam elements. In that case closed-end conditions generate a physically non-existing force at the transition between pipe and beam elements. Such mixed modeling of a pipe is not recommended."