Question: A rectangular bar is subjected to direct stress x and y in two mutually perpendicular direction show that for a oblique plane the stresses are

A rectangular bar is subjected to direct stress x and y in two mutually perpendicular direction show that for a oblique plane the stresses are given below
Normal stress
n=x+y2+x-y2cos2
1=x-y2sin2
Shear stress
A rectangular bar is subjected to direct stress x

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