A high-strength, ASTM-A242 steel plate covers a circular opening of diameter d = 2a. Assumptions: The plate is fixed at its edge and carries a uniform pressure po . Given: E = 200 GPa, = 345 MPa (Table D.1), v = 0.3, t = 10 mm, a = 125 mm. Calculate (a) the pressure po, and maximum deflection at the onset of yield in the plate; (b) allowable pressure based on a safety factor of n = 1.2 with respect to yielding of the plate.
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