Hi everybody! I'm having some problem with the following system... I have a 2D problem, a disk is rotating with constant velocity, but there is a friction on the boundary due to the contact between the disk and the surrounding material. I'd like to find the analytical formula of the radial, tangential and shear stress. I've read many books but in each book the problem is solved without friction and without bodyload. If you have more specific books to suggest I'll be very happy! I've tried to use the Airy's function method, but I'm not sure, also because the fomula that I've obtained yield to strange value.. can anyone suggest me how to solve such a problem?