Project ForgeMachine Design
Design Against Static Load
GATE 2018
Easy
Pre-tensioning of a bolted joint is used to
- Astrain harden the bolt head
- Bdecrease stiffness of the bolted joint
- increase stiffness of the bolted joint
- Dprevent yielding of the thread root
Explanation
Pre-tensioning a bolted joint clamps the joint members tightly together, effectively increasing the stiffness of the bolted joint as a whole relative to the bolt's own stiffness — this reduces the share of any external fluctuating load that reaches the bolt, improving fatigue performance.
Source: GATE ME 2018 Session 2 (Set 2) (2018)
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