Impact study works using beams, but fails when using plate elements

Creator
Creator

I am trying to do an impact test of a bicycle handlebar using Femap with NX Nastran V11.4.2 and the Nonlinear Transient Response solver with a gap element. It does exactly what I expect it to do when using beam elements, but it fails when using laminate plate elements. I initially thought it is just my PC not being powerful enough, but even when using a very coarse mesh, it fails. I keep getting system fatal message 1013: cannot find cluster pointer record. What am I doing wrong?
Beam model: https://1drv.ms/u/s!Atk8fkOplPa7gfEhHBamiylEz1bvmQ

Plate model: https://1drv.ms/u/s!Atk8fkOplPa7gflBqNxbkk13qGYiWA

 

2 REPLIES 2

Re: Impact study works using beams, but fails when using plate elements

Siemens Phenom Siemens Phenom
Siemens Phenom

The issue turns out to be the laminate elements in SOL 129. This seems to be a Nastran bug. So far the only workaround I see is to remove the stress output request if you need the laminate material/property for stiffness calculations.

The other option is to use regular plate elements. The model runs and produces stress results with regular plate elements.

I will file a PR for this issue.

 

Regards,

 

Joe

Re: Impact study works using beams, but fails when using plate elements

Creator
Creator

Hi Joe,

 

Thanks so much for your reply! I was getting crazy over this issue. I think I can work with that workaround.

 

Best regards,

Jonas