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Section & Integration Points in S4R elements.

Section & Integration Points in S4R elements.

Section & Integration Points in S4R elements.

(OP)
Hello,

I'm applying residual stresses(never-ending story ;)) using SIGINI subroutine. This thread is about Section Points and Integration Points notation in shell element.

I use Simpson thickness integration method(default value - 5 points through thickness).
What is KSPT(Section point number within the current layer) exactly?
So in my case, there are 5 layers and there are 4 section points and 1 integration point for each one:
Layer | Section Points | Integration Point
1 | 1,2,3,4 | 1
2 | 5,6,7,8 | 2
3...
4...
5...

In the other words - in each shell element node(4) there are 5 section points.
Is it the correct assumption? Or am I wrong?

To set linear residual stresses(not constant) in the shell element but constant through the thickness all I have to do is find the shell element node(NOEL), then section point in this node(KSPT) and then, set the stresses sigma(1)=...
Is it OK?

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