Cantilever equilibrium problem

[UMath1]

So is bending moment a force or a torque? Tension is a force if I understand correctly.

 

[Dale]

Neither. They are all stresses. The units for stress are the same as the units for pressure, but in solids they can point in directions other than perpendicular to the surface.

 

[UMath1]

So Tjoint is not a torque but a stress? How does it cancel out the other torques then?

 

[Dale]

If you integrate a stress over an area you can get a torque or a force.

This is related to what we discussed earlier about the point force and point torque approximations.