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Using ANSYS to model the process of pipe expansion

Using ANSYS to model the process of pipe expansion

Using ANSYS to model the process of pipe expansion

(OP)

I wan to use ANSYS to model the following process of expanding a steel pipe.  I am not sure if this is a right problem to ask here.  Since I am new to ANSYS and need some results for this problem soon, I really appreciate if someone could help me to get started.  Thank you very much in advance.  I am also a new member of this Eng-Tips.

A steel cone with a 7.79" diameter (a rigid body) is pushed through a 10 ft long round pipe which has an inner diameter of 6.875", outer diameter of 7.625", and wall thickness of 0.375".  Due to the plastic deformation, the inner diameter of the pipe will be enlarged to 7.79" after the process.  I am particularly interested in calculating the residual stresses.

My questions are the following:

1. Since this is a highly nonlinear and dynamic problem, can ANSYS/Structural model this problem correctly?  Do I need to use ANSYS/LS-DYNA?  Since we only have the license of ANSYS/Structural.  Do we have to buy ANSYS/LS-DYNA too?

2. Is this problem better handled by using ABAQUS?

3. Which geometric model should I use?  Axisymmetric 2D model or a full 3D model?

4. Which element type should I use?  Under axisymmetric 2D solid element category or under 3D solid element category?  Specifically, which element in particular best fits here?

5. How to generate mesh? automatically or manually?  What is the best mesh density?

6. How to add this dynamic load at the bottom of the cone so that at a certain value, the cone will be pushed hard enough to start to move along the pipe?

7. Finally, are there any other things that I need to pay attention to?

Thank you very much for your time and appreciate your help.

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