engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Strength of Materials Testing of Materials
The Brinell hardness is calculated by :
(Where P is load in N, D is steel ball diameter and d is indentation diameter in millimetres.)
1
\(\frac{P}{\pi D(D-\sqrt{D^2-d^2)}}\)
2
\(\frac{P}{\pi D\sqrt{D^2-d^2}}\)
3
\(\frac{2P}{\pi D(D-\sqrt{D^2-d^2)}}\)
4
\(\frac{2P}{\pi D^2}\)