For a hollow round tubing with outer diameter do= 6 in and wall thickness t= 0.25 in that is welded to a plate with a fillet weld size ℎ = 0.25 in and weld strength sweld = 50 ksi, assume that failure occurs only in the weld. for the following loading conditions calculate the allowable force or moment before failure:
a.) axial loading, calculate fallow[#]
b.) pure bending, calculate mallow [in#]
c.) pure torsion, calculate tallow [in#]

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater