With the hanging load of 5000 lbs what is the axial load in

With the hanging load of 5,000 lbs, what is the axial load in the cross member D? All connections are pin joints. Assuming an axial load of N (8,500,500) in member D of the figure, what is the needed diameter to have reliability of 75% assuming member D is a long slender column? Assume the material has a yield strength of N (60,000,200) psi and modulus of elasticity of N (30e6,3e5) psi.

Solution

The operating design point for a PEMFC of 500cm2 is 750mA/cm2 with an air stoichiometry of 1.8 with dry inlet air at 250kPa. Determine and plot temperaturevs. pressure drop required to ensure all the product water is removed by the cathode gas stream in the temperature range [20-90 °C ].
Interpret the result at 90 °C.