Term
What are the units of shear stress? 

Definition
force per area, like psi or MPa 


Term
To solve for the maximum shear stress, what is Q for a rectangle with a base of 2 and a height of 6? 

Definition
Q = area * distance
max. is at the ENA
y bar = 3"
area = 3" x 2" = 6 in^2
distance = 3/2 = 1.5"
Q = 9 in^3 


Term

Definition
length cubed, like in^3 or mm^3 


Term
If you have a T crosssection and are asked to find shear stress at the junction between web and flange, what do need to remember? 

Definition
You have to do the shear stress calc twice: one with the large thickness and the other with the small thickness.
There is a jump in shear stress plot when the thickness is discontinuous. 

