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A muff coupling is connecting two shafts. The torque involved is 650N-m. The shaft diameter is 45mm with length and breadth of the key being 14mm and 80mm respectively. Find the shear stress induced in the key.

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A muff coupling is connecting two shafts. The torque involved is 650N-m. The shaft diameter is 45mm with length and breadth of the key being 14mm and 80mm respectively. Find the shear stress induced in the key.

(a) 30.2N/mm²

(b) 25.8N/mm²

(c) 34.4N/mm²

(d) None of the listed

This problem was given to me by my instructor.

This question relates to the Couplings concept in part Shafts, Keys and Couplings of Machine Design

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