Question

Consider the following statements:
1. Energy absorbing capacity of threaded portion is higher than that of the shank of a bolt.
2. In an eccentric loaded bolted joint in shear, the bolt which is closer to applied load is worst loaded.
3. Tensile and shear stresses are induced in bolt without preloading. Which of the above statements are correct?

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

Answer 1

The correct option is C 1 and 2

• Area of cross-section of threaded portion is less than that of the shank, so stress induced in threaded portion is higher. We know that strain energy is, $U\propto {\sigma }^2$ Hence, threaded portion has higher energy absorbing capacity.
• Tensile. shear and compressive stresses are induced on the bolt without preloading.