Difference principal stresses

Hello everyone,

I have this super basic question. When you have the “ShellView” component you can check the principal stress 1 & 2. What is the difference between these? Is it just top versus bottom of the shell? Thanks in advance!


these are the two directions of principal stresses in the shell. Please refer to 3.7.12: ShellView - Karamba3D 2.2.0