are the three principal stress quantities at 
and 
respectively, then4.6(c) Maximum Shear Stress (Ct’d)
Next: 4.6(b)Maximum Shear Stress (Ct’d)It can be shown that if
are the three principal stress quantities at
and
respectively, then
At 
we have shear 
If 
and 
are the
maximum and minimum principal stresses, then
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