Strength of Materials

QUESTIONS

1. Draw a stress–strain diagram for a brittle material. Explain different stress levels.
2. What is lateral strain? How is it related with Poisson’s ratio? What is the maximum value of Poisson’s ratio?
3. What is a compound bar? How will you compute the elongation of a compound bar subjected to axial load?
4. What are elastic constants? Define the interconnected relations.
5. What are temperature stresses? Give the practical applications.
6. Results from a tensile test on a mild steel bar are given below:

   Diameter of bar = 2.5 cm, Gauge length = 5.0 cm, Load at limit of proportionality = 82,000 N, Extension of the bar at the limit of proportionality = 0.042 mm, Yield load = 86,000 N, Maximum load = 150,000 N, Length between gauge point after test = ...