The cotter is used to hold the two rods together. Determine the smallest thickness t of the cotter and the smallest diameter d of the rods. All parts are made of steel for which the failure normal stress is σ_fail= 500 MPa and the failure shear stress is τ_fail= 375 MPa. Use a factor of safety of (F.S.)_t= 2.50 in tension and (F.S.)s = 1.75 in shear.

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30 kN T10 mm 40 mm 30 kN