(3) A machine part of uniform thickness t = b/2.5 is shaped as shown and machined all over from AISI C1020, as rolled. The design is for indefinite life for a load repeated from 1,750 lb to 3,500 lb. Let d = b. (a) For a design factor of 1.8 (Soderberg), what should be the dimensions of the part? (b)What is the maximum tensile stress in the part as designed?

A square key fixing a gear on a 30 mm diameter shaft. The shaft is transmitting a power of 18 kW to the gear at 800 rpm. The key is made of steel with a yield strength of 470 N/mm² and the factor of safety is 2.5. The yield strength of the key material in compression can be assumed to be equal to the yield strength in tension. Determine the dimensions of the key.

Answer is closer to 32 kN/m, but how does it get there?

Problem 4 Press-Fit (3-116) Matlab Code is for (3-117) The table gives data concerning the shrink fit of two cylinders of differing materials and dimensional specification in inches. Elastic constants for different materials may be found in Table A-5. Identify the radial interference &, then find the interference pressure p, and the tangential normal stress on both sides of the fit surface. If dimensional tolerances are given at fit surfaces, repeat the problem for the highest and lowest stress levels. Problem Number Material 3-116 3-117 Inner Cylinder di Steel Steel 0 0 do 2.002 2.002 Outer Cylinder D; Material Steel Cast iron 2.000 2.000 Do 3.00 3.00

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