Nastran reduced shear integration

[vanji1]

Hello

In Nastran, for CHEXA elements, what is reduced shear integration?

Sincerely yours,

 

[Jetgirl8]

You can find a helpful MSC Software paper on the topic here:

http://www.mscsoftware.com/events/vpd2006/na/presentations/tech_papers/27.pdf

But generally, reduced shear integration is a numerical technique used to reduce the problem of "shear locking" or overly stiff results.

When the future's architectured
By a carnival of idiots on show
You'd better lie low

 

[vanji1]

Thank you for your response. I understand better the point.
Nevertheless, what I am exactly looking for is the numerical method used by Nastran for reducing the stiffness. In the manual, this is not very clear, they are talking about underintegrating some terms. Nevertheless, this is not true. When exporting a elementary matrix, I see that Nastran remove 10% of the diagonal term and some terms are removed by 5% and others 2.5%. I would like to know what Nastran does exactly. If it exists a paper about the algorithm used by Nastran, this would help for my present analysis.

Sincerely yours

Evangeline

 

[SWComposites]

have you called Nastran tech support and asked for the technical background info?