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Cable inside a pipe

Cable inside a pipe

Cable inside a pipe

(OP)
Hi all,

Im trying to make a model of an electrical cable inside a pipe laying at a seabed. This is modeles using the 'slide line option in abaqus. The pipe is subjected to temperature loading and expands. The cable can not see the same expansion; hence it has to be layed with an overlength inside the pipe. Any suggestions on how to model a pre-bended cable which wil straightens out when the pipe expands? The cable can see small compression, but the strain should not exceed 0.04% strain, so the *no tension/compression option in abaqus is not relevant. The cable has to be checked for compression as well.

What kind of elements are best for modeling of a cable? I have so far used an isotropic material behaviour; I assume that this is more an anisotropic (hypoelastic) behaviour?

All suggestions are appriciated.

RE: Cable inside a pipe

I think that C3D8H elements would work just fine, also you could adjust mesh controls to Hex, sweep and medial axis sweep Technic or pipe elements could work too.

RE: Cable inside a pipe

(OP)
The pipe and the cable are modelled with beam elements B31H (hybrid formulation). The thing is that you define the E-modulus and the beam section (in this case circular), which than decides your EI (bending) and EA (axial) stiffness. But I want the bending stiffness to be very small. Is there a way to define this?

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