engineering recuitment BHEL Engineer Trainee Mock Test 2025 Strength of Materials Theory of Failure Maximum Principal Stress Theory
According to the maximum normal stress theory, the diameter of circular shaft subjected to bending moment M and torque T is
(where σy is the yield stress in the uniaxial tensile test and N is the factor of safety)
1
\(\rm \left[\frac{N}{\pi\sigma_y}\left(16M+16\sqrt{M^2+T^2}\right)\right]^{\frac{1}{2}}\)
2
\(\rm \left[\frac{1}{\pi N\sigma_y}\left(16M+16\sqrt{M^2+T^2}\right)\right]^{\frac{1}{2}}\)
3
\(\rm \left[\frac{1}{\pi N\sigma_y}\left(16M+16\sqrt{M^2+T^2}\right)\right]^{\frac{1}{3}}\)
4
\(\rm \left[\frac{N}{\pi\sigma_y}\left(16M+16\sqrt{M^2+T^2}\right)\right]^{\frac{1}{3}}\)