Strength of Materials

QUESTIONS

1. What are the principal stresses and principal planes? Derive the expression for maximum shear stress in a 2D stress system.
2. Show that the sum of the normal components of the stresses on any two planes at right angles is constant in a material subjected to a 2D stress system.
3. Derive an expression for the stress on an oblique section of an elastic rectangular body where it is subjected to a direct stress in one plane only.
4. Explain the significance of Mohr’s circle and its uses.
5. Using Mohr’s circle, derive expressions for normal and tangential stresses on a diagonal plane of a piece of material in pure shear.
6. The direct tensile stress acting at a point in two mutually perpendicular planes are 500 N/mm² and 200 N/mm². The complementary ...