 
 
 
 
 
 
 
 
 
 
sorry forgot to say its used to find maximum maximum shear stresses too which causes failure and various kinds of maximum and minimum stress any object can handle before it can break principle normal stresse s 1 2 &3 are also maximum stresses and shear is same throughout the element stress occurs only in plane among the infinite plane passing through the point of the stress element tensor one plane has the unique minimum and maximum stress
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
