What is the difference between xy-shear stress and Max. shear stress?

SurekaS Posts: 3

I must calculate shear stresses at different time instants in QUAKE/W. There are two options to calculate shear stresses. 1. Under total stresses, there is an option called xy-shear stress and 2. under shear stresses, max. shear stresses. The results of both for a particular node are different.

What are the calculation basics for these two?

There is no water in my model