Hi Everyone, I am having a problem finding the shear stresses in an annular plate. The problem is as follows. I have an annular plate with outer radius a, inner radius b. Outer and inner edges are fixed. I also have an annular line load at radius r. I am trying to calculate the shear stresses at a and b. Using Roarks equations to find the shear line forces Qa and Qb I get one of the forces as a positive number and one as a negative number...this makes no sense to me as both forces should be in the same direction as the applied force, at least that's what it seems to me. So am I calculating them correctly and just don't fully understand what is going on or is there some mistake in my math...I've checked the equations about ten times and can't find anything wrong. Any hlep would be great. Thanks.