Direction of Shear Stress at the Edge: Why Do the Top and Front Planes Meet?

[fonseh]

Homework Statement

In the notes , i noticed that the shear stress on the top plane and the front plane will 'meet together' at the edge . I don't understand it why the direction is like that .

Homework Equations

The Attempt at a Solution

Is it possible for both the shear stress to become like this (opposite direction ) ? [/B]

 

[PhanthomJay]

F

Homework Statement

In the notes , i noticed that the shear stress on the top plane and the front plane will 'meet together' at the edge . I don't understand it why the direction is like that .

Homework Equations

The Attempt at a Solution

Is it possible for both the shear stress to become like this (opposite direction ) ? [/B]

say fonz you are not paying attention, by now you should know that every vertical shear stress VQ/It in the xy plane is accompanied by a longitudinal equal stress in the z direction in the xz plane.