Is it possible to implement this in piping stress analysis software?

Or this is already implemented?

I believe, the friction stiffness is only applied at the first iteration, and depending on the outcome if the pipe will slip or stick, the force method will be used in the subsequent iterations until convergence is achieved from the criteria being set.

However, I believe, the resilient friction restraint approach will always use the friction stiffness at each iteration, in which it will be derived from the displacement/friction force at the current state (and the friction stiffness will be used on the next run) until convergence and stability are achieved.

Warm Regards,

Upon further reading, If the support sticks due to friction (load perpendicular to support is less than friction load mu*N), then the restraint with friction stiffness will be applied in the stiffness matrix of the system.

However, if the pipe slips (load perpendicular to support is greater than friction load mu*N), a force (mu*N) opposite the direction of movement will be applied in the force vector of the system.

I believe the question will be, should the stiffness to be used will be (mu*N/sqrt(dx^2+dz^2), (where, x,z being perpendicular to the support axis)?

And I think, the resilient friction restraint approach, does not use the force approach either in the stick or slip condition (it always uses the stiffness approach) from the term itself.

Warm Regards,

But I am thinking of the memory required to implement this at each node of the piping system.

We're all in the same page in this case.

Cheers!!