Question

Principal stresses and their directions are calculated by using ____

(a) Galerkin approach

(b) Rayleigh method

(c) Potential energy method

(d) Mohr’s circle method

I have been asked this question at a job interview.

My doubt stems from Two Dimensional Problems in portion Two Dimensional Problems using Constant Strain Triangles of Finite Element Method

Answer 1

The correct choice is (d) Mohr’s circle method

The explanation is: Mohr’s circle is two dimensional graphical representation of the transformation law. While considering longitudinal stresses and vertical stresses in a horizontal beam during bending.