A large thin plate of crosssection 150 mm X 2 mm is subjecte

A large thin plate of cross-section 150 mm X 2 mm is subjected to uniform biaxial tensile force 100 N. The plate contains a small hole of radius a. Calculate the stresses (sigma_r, sigma_theta and tau_r theta) in polar co-ordinate system (r, theta) by applying method of superposition. Also obtain the stress the plate is solid (without a hole).

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.