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Plane stress modelling in Nastran

Plane stress modelling in Nastran

Plane stress modelling in Nastran

(OP)
I am not a Nastran user, but I'm working with someone who is.  I'm an Ansys user.  I'm accusomed to doing a plane stress analysis with PLANE42 elements.  My co-worker is using QUAD4's with the out of plane degrees of freedom held.  Is that valid?  I thought a QUAD4 was a shell element, like an Ansys SHELL63.  Is there a better choice of Nastran elements for a plane stress analysis?

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