GATE 2017 ME (ME1) – Question 29
The riveted lap joint shown carries tension $F$. Rivet diameter is $d$, plate width is $W$ and maximum permissible tensile stress is $S_f$. Assuming identical plates, what minimum plate thickness prevents tensile failure?
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Correct answer: (A) $F/[S_f(W-2d)]$
Explanation
The critical transverse net section passes through the two rivet holes shown. Its remaining width is $W-2d$, so its tensile area is $t(W-2d)$. Requiring $F/[t(W-2d)]\leq S_f$ gives $t_{min}=F/[S_f(W-2d)]$, A. This check is for plate tension; rivet shear and bearing are separate failure modes.