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Ling Kliment

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Aug 2, 2024, 8:15:27 PM8/2/24

to specheadtiho

I am now using a simplified model similar to ( -nastran/troubleshooting/caas/sfdcarticles/sfdcarticl...) and went the route of beam elements and rigid body connectors to simulate the pin, following the tutorial as close as possible.

When I run the analysis, the beam element does not bend as expected, but rather hinges in the centre. Is this the correct behaviour or am I missing a something? Another concern I have is that the holes for the male and female clevis become misaligned. The pin does not fail in shear so I imagine the holes should stay aligned even with the exaggerated deformation shown.

The bottom face of the model is constrained in all directions and a 30000N load is placed on the top face. All surface contacts are separation. I have also tried using a surface contact between the inside faces of the clevises and the beam element to see if that fixes the alignment issue, but appear to make no difference.

Another concern I have is that the holes for the male and female clevis become misaligned. The pin does not fail in shear so I imagine the holes should stay aligned even with the exaggerated deformation shown.