Question

Region of safety for maximum principal stress theory under bi-axial stress is shown by:

• A. Square
• B. Hexagon
• C. Ellipse
• D. Pentagon

Answer 1

Answer:

A. Square

The region of safety for maximum principal stress theory under bi-axial stress is a square. This theory states that the maximum principal stress must not exceed the working stress for the material. The graphical representation is always a square, even for different values of $\sigma_{1}$ and $\sigma_{2}$ This theory gives a satisfactory result for brittle materials that don't fail by yielding but fail by brittle fracture.