Question

Which of the following points are considered while deriving the formula

$\frac{M}{I}=\frac{f}{y}=\frac{E}{R}$?

1. Type of material.
2. Transverse shear force.
3. The stresses in the remaining principle direction.
4. ${\sigma }_y={\sigma }_z={\tau }_{xz}={\tau }_{zx}=0$
5. Linear variation of strain

Select the correct answer using the codes given below :

• A. 1, 2 and 4
• B. 2, 3 and 5
• C. 4 and 5
• D. 1 and 3

Answer 1

The correct option is C 4 and 5

While deriving the formula, following consideration are made:

• Linear variation of strain
• Pure bending
• Under pure bending

${\sigma }_y={\sigma }_z={\tau }_{xz}={\tau }_{zx}=0$