Hello everyone,
In Abaqus, my model uses shell elements. After the simulation when I try to compare the principal stresses, there are 4 possibilities :
1. Max In-plane Principal
2. Max Principal
3. Min In-plane Principal
4. Min Principal
I was expecting 1. and 2. to produce the same values. Same goes with 3. and 4.
However, the in-plane principal stresses and the principal stresses are producing different values. (See attached pictures)
Could someone shed some light on this? Would be very helpful to me!
(The simulation is a thin-walled pressure vessel made of rubber, under 0.5 MPa internal pressure loading.)