albertoruenes
New member
Hi all,
I'm working with some linear(101) and non-linear(106) models to extract membrane forces from composite structures modelled via pcomps.
As the membrane force direction matters for the post-process analysis(i.e. using the f06 loads i calculate stresses and strain for the composite out of Nastran) in the direction of the principal axes.
For linear solution the membrane forces in the x and y direction are very similar to the membrane forces in the y and x (i.e. inverted axes).
Do you know if this is a common case in Nastran and if there is any way to prevent or know which orientation is the correct between linear and non-linear?
I'm working with some linear(101) and non-linear(106) models to extract membrane forces from composite structures modelled via pcomps.
As the membrane force direction matters for the post-process analysis(i.e. using the f06 loads i calculate stresses and strain for the composite out of Nastran) in the direction of the principal axes.
For linear solution the membrane forces in the x and y direction are very similar to the membrane forces in the y and x (i.e. inverted axes).
Do you know if this is a common case in Nastran and if there is any way to prevent or know which orientation is the correct between linear and non-linear?