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I’m now modeling two plaques that are connected; one is made of composite material with ply orientation, while the other is a simple mould with isotropic properties.
I’m using a C3D20T element, and the contact type is surface to surface with small sliding, frictionless, contact controls, hard contact, and direct in normal behavior, with zero tolerance defined. However, I receive the following message:
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.
What can I do about it?

CAE Assistant in Social Media Abaqus   ResearchGate   zero pivot   boundary conditions
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Hi,

You get this error when you don’t use enough boundary conditions. I recommend checking this link for more info, especially the section 2.12 of this article because it’s about your problem:

https://caeassistant.com/blog/abaqus-errors-debugging-techniques/

If you have problems simulating the composite or composite damage, it’ll be worth it to check the links below:

https://caeassistant.com/product/damage-analysis-in-macro-modeling-of-composite-materials-in-abaqus/

https://caeassistant.com/product/3d-continuum-hashin-progressive-damage-for-composite-materials-in-abaqus-vumat-subroutine/

I hope I could have helped you.

Bet luck.

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