Hi
I want to model a composite laminate by shell99 in ANSYS.This laminate is symmetrical about the midplane,so I adjust Layer Symmetry Key(LSYM) to 1 and halve the number of layers. when I compare the maximum deflection of this model with the max deflection of the model with LSYM=0(by inputing total layers) there is a big difference between these two results. It's natural that the results should be the same. I don't know why this error occurs.