Question

At a certain point in a strained material, there are two mutually perpendicular stresses ${\sigma }_x=100N/m{m}^2$ (tensile) and ${\sigma }_y=500N/m{m}^2$ (compressive).
[Notation : tension (+); compression (-)]
What are the values of the principal stresses in $N/m{m}^2$ at the point?

• A. 100, -50
• B. -100, 50
• C. 75, -25
• D. -75, 25

Answer 1

The correct option is A 100, -50

The given stresses are principal stresses as they are given on two mutually perpendicular planes and associated shear stress on these planes is zero.