Learning Forum

[luishernandez19]

Hello, I am simulating a compression test on metal foams. For edge conditions, I am replicating an undergraduate thesis where they consider the following:

At Z = 0, an displacement 0 in z

At Z = H, a remote displacement where, to simulate the compression test, I add a deformation of 1% of the initial length and restrict the rotation in Z.

The problem is that the simulation throws me the following errors

During this solution, the elapsed time exceeded the CPU time by an excessive margin.  Often this indicates either a lack of physical memory (RAM) required to efficiently handle this simulation or it indicates a particularly slow hard drive configuration.  This simulation can be expected to run faster on identical hardware if additional RAM or a faster hard drive configuration is made available.  For more details, please see the ANSYS Performance Guide which is part of the ANSYS Help system.

One or more remote boundary conditions is scoped to a large number of elements which can adversly affect solver performance.  Consider using the pinball setting to reduce the number of elements included in the solver.

Not enough constraints appear to be applied to prevent rigid body motion.  This may lead to solution warnings or errors.  Check results carefully.

An internal solution magnitude limit was exceeded. Please check your Environment for inappropriate load values or insufficient supports.  Please see the Troubleshooting section of the Help System for more information.

 

 

[Sai Deogekar]

Based on the boundary conditions that you have described, it looks like rigid body translation in x and y directions can occur. There are no boundary conditions to prevent that. Can you fix one point (may be the center of the base z=0) in x and y-directions? 

Hope this helps,

Sai

 

[luishernandez19]

I tried applying displacement 0 in xy and z and above a remote displacement and restricted both rotation and displacement in the axes except Z. The problem is that the results are far from what I should get, supposedly the results were obtained with the conditions I mentioned higher but it doesn't work

[Sai Deogekar]

Could you describe your new boundary conditions again? I am not sure I understand them clearly. Also, is there a reason you chose to apply Remote Displacement on the top surface instead of Displacement boundary condition? 

[mayanknitro]

Can u please tell or attach file how to made spherical pores in Design Modular. I am trying but unable to make pores.n