Exercise 4, Stresses and principal stresses
This exercise is divided in two problems, Problem 3-1 and Problem 3-2, both specified below.
Problem 4-1
A prismatic steel bar of 50-mm by 50-mm square cross section is subjected to an axial tensile load
P = 125 kN. Calculate the normal and shearing stresses on all faces of an element oriented at
a) $\theta$ = 20°, and
b) $\theta$ = 45°.