Unfortunately, these issues lead to interlaminar stress predictions that are generally poor. Consider a two-layer thin shell loaded in shear. The shell consists of two equal-thickness isotropic layers, one stiffer than the other. The plot below shows the prediction of τ xz through the two layers, with the value of τ xz at the interface containing the interlaminar shear value. A model using eight solid elements through the thickness (four elements through each layer), and a model using layered shell elements correlate reasonably well. The result from a layered solid is much less accurate, and the interlaminar stress prediction is particularly troubling since it is discontinuous at the interface.