Topic: Machine Design
Two flanges are connected by a single bolt of nominal diameter 10 mm and is preloaded to a torque of 30 Nm. An external tensile load of 10,000 N is applied to the joint. The torque coefficient is 0.15 and joint stiffness constant is 0.2. The maximum tension in the bolt is
- A. 10,000 N
- B. 20,000 N
- C. 22,000 N
- D. 30,000 N
Answer: C. 22,000 N
Explanation: Preload force Fi = Torque / (K * d) = 30 / (0.15 * 0.010) = 20,000 N. The maximum tension in the bolt Fb = Fi + (C * P) = 20,000 + (0.2 * 10,000) = 20,000 + 2000 = 22,000 N.