Too many attempts made for this increment

[EmilyHCH]

Hello!

Trying to model compression tube fittings but keep coming across the error of "too many attempts made for this increment" Our load is a uniform load applied to the surface as pictured in the attached file at about 4600 lbs. We've already looked at comments to try to fix this by changing increment sizing, applying a smaller load, making sure our materials are correct, etc. We've made everything a rigid body except for the two smaller components only visible by cross section in the assembly named, "rear ferrule" and "front ferrule". We've applied one boundary condition to the "cap" telling it to remain fixed in space. Any help you could provide to get us past this error and to a working model would be greatly appreciated. The .cae and .jnl files are attached.

 

[EmilyHCH]

What do you mean by make use of symmetry. Also fyi if it makes a difference our part files originated from solidworks not abaqus I know sometimes that limits changes to the assembly you can make.

 

[FEA way]

If you simplify the external shape of cap and nut (so that they are cylindrical, not hexagonal) you will be able to use symmetry of your choice - planar, cyclic or axial. Such simplification of these parts shouldn’t cause significant difference in results since they are rigid.

 

[EmilyHCH]

We tried displacement load under boundary conditions instead of the concentrated force under loads. With this we got the error "THE ANALYSIS HAS BEEN TERMINATED DUE TO PREVIOUS ERRORS. ALL OUTPUT REQUESTS HAVE BEEN WRITTEN FOR THE LAST CONVERGED INCREMENT" Is there a way to find out what the last converged increment is so that we can try to problem solve? What do you think could be the issue now, still the RBMs?

 

[FEA way]

This message means that there are more errors in the dat and msg files. Check them as they can indicate the actual reason of nonconvergence.

You can open odb file and plot output variables for this last converged increment (it’s simply the last available frame in the output database). Job Diagnostics tool may also be helpful.