4.3(b) Components of Stress Tensor (Contd.)

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  At a point, P, let  be the unit normal.  Then is the traction along the direction .

 

If , then

     *     is the normal stress component,

*      shear stress=

 

Magnitude of  shear stress,

 

In summary,

      or,        or     

Next: 4-4 Symmetry of stress tensor