Project ForgeMachine Design
Design Against Static Load
GATE 2017
Hard
Consider the schematic of a riveted lap joint subjected to tensile load F. Let d be the diameter of the rivets, and Sf be the maximum permissible tensile stress in the plates. What should be the minimum value for the thickness of the plates to guard against tensile failure of the plates? Assume the plates to be identical.
- F / [Sf(W-2d)]
- BF / [SfW]
- CF / [Sf(W-d)]
- D2F / [SfW]
Explanation
At the critical net section through both rivet holes (each removing diameter d from the plate width W), the tensile stress is F/[t(W-2d)]. Setting this to the permissible stress Sf and solving for minimum thickness t gives t = F/[Sf(W-2d)].
Source: GATE ME 2017 Session 1 (ME-1) (2017)
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