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If any cross section is subjected to direct tensile stress and bending stress, then find the dimension of cross section. Given length & breadth are t and 2t respectively. F=25kN acts on the top fibre of the cross section, M=F x t . Also maximum allowable tensile stress =100N/mm².

(a) 25.5mm

(b) 30.2mm

(c) 27.55mm

(d) None of the mentioned

I was questioned about this in a dream while sleeping.

This conceptual question is from the Knuckle Joint topic in part Design Against Static Load of Machine Design

1 Answer

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by (52.6k points)
Suitable answer is (a) 25.5mm

For a clear picture: σ= [P/A] + [My/I], where y=t &  I=t(2t)ᴲ/12.

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