Errors in ABAQUS Composite model 1

[BrendaGR99]

Hi!

Currently I'm modeling a composite, however, the following error appears:

***ERROR: 48 elements have missing property definitions. The elements have
been identified in element set ErrElemMissingSection.
***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO
INTERPRET SOME DATA. SUBSEQUENT ERRORS MAY BE CAUSED BY THIS OMISSION

I used Engineering Constants and also added orientation of plies by making a shell section, my element type for my mesh is C3D20T. I will attach my model.

 

[FEA way]

You assigned a shell/continuum shell section to a part meshed with solid coupled temp-disp elements. That's why it doesn't work.

 

[BrendaGR99]

Thank you! I decided to cut the layers with "offset faces", did a solid homogeneous section and just added orientation with "Assign Material Orientation". That seemed to solve the errors but now I get the following warning:

The aspect ratio for 960 elements exceeds 100 to 1. The elements have been identified in element set WarnElemAspectRatio.

I don't know if I should make my mesh finer. I will attach the updated model.

 

[BrendaGR99]

By refining the mesh it appears that the aspect ratio warning no longer appears, I will see if the model functions now

 

[BrendaGR99]

Now I get the following warning:
Solver problem. Zero pivot when processing D.O.F. 1 of 22 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_1_1_1_1_1.

 

[FEA way]

Likely, the model is unconstrained. This is a common problem with analyses involving contact. Try to eliminate the potential rigid body motions.