I have a pipe with a large diameter in 3D shape. Another pipe with smaller diameter but different material will need to be inserted in the large pipe to follow the 3D shape. Gravity effect will apply. need to find out the axial force ( friction force is known) and collision points to feed the smaller pipe into the large one. The larger pipe is solid and can't be deformed. Need to run simulation to calculate the axial force required to feed the smaller pipe through the large one. (FF is known). if Buckling is to take place, will need to know when it will happened and what is the max force we can apply before buckling starts.

any leads or advise in this issue will be much appreciated.

thank you.

Nasser