Abaqus Composite Layup 1

[Joe Cyrne]

Regarding the process of defining a layup in Abaqus, I have a question. If I have, let's say, a geometric SHELL rectangular prism with a base of 200x100 mm and lenght 300 mm, and then define a layup of 5 plies, each with 1 mm thick, with offset=0 in all walls, how will Abaqus do this?

Will it put 2 plies inside the geometry shell, the middle ply coincident with the shell and 2 plies outside the shell?

Or will it start by putting the first ply where the shell prism is and put the others on top of it?

Or will it do it in any other way?

Thank you

 

[Erik Panos Kostson]

Hi I am not sure I understand your geometry correct, but in general, according to the documentation, it says that it will put in the first ply at the bottom of the stack, thus the last one should be at the top. If you have 5 plies, then the first is at the bottom, the 3rd is placed at the mid-surface, that is at the surface/shell plane (thus the ply is cut in two equal halfs by the mid-surface), and the 5th one is on the top. So relative to the mid-surface/shell/surface plane of the geometry the 1st ply has its bottom outer ply face 2.5 mm relatively to that surface, and the top ply has its outer top ply face 2.5 mm also, but in the other direction. Hope the sketch says more than these words.
[URL unfurl="true"]https://res.cloudinary.com/engineering-com/image/upload/v1531484340/tips/ST70062_ikqirt.pdf[/url]

 

[Joe Cyrne]

Thank you!