Archive image from page 27 of Deep ocean power systems (1968). Deep ocean power systems deepoceanpowersy00gior Year: 1968 Pb = critical buckling pressure, psi Pj,y = critical yielding pressure, psi Ri_o = local outside radius of a spherical shell, in. a = yield stress, psi The equations governing the collapse of cylinder shells are considerably more complex than for spheres. A method developed by General Dynamics was used to analyze the collapse by yielding of a cylinder and hemispherical cylinder heads. This method calculates outer fiber, midfiber, and inner fiber stresses at frames and mid
Archive image from page 27 of Deep ocean power systems (1968). Deep ocean power systems deepoceanpowersy00gior Year: 1968 Pb = critical buckling pressure, psi Pj,y = critical yielding pressure, psi Ri_o = local outside radius of a spherical shell, in. a = yield stress, psi The equations governing the collapse of cylinder shells are considerably more complex than for spheres. A method developed by General Dynamics was used to analyze the collapse by yielding of a cylinder and hemispherical cylinder heads. This method calculates outer fiber, midfiber, and inner fiber stresses at frames and midbay as well as deflections and local stresses. Computations were made for two types of collapse of a cylinder by buckling. Lobar buckling was approximated by E (1 - m') Pk = Buckling by instability was approximated by ,4 Pk = Eh a W 1 + where P, = lobar buckling, psi E = modulus of elasticity h = shell thickness, in. a = nominal outside shell radius, in. M = Poisson's ratio n = number of lobes m = a/L L = effective length of cylinder, in. 1 = moment of inertia of shell frame R = radius of frame-shell section, in. General Dynamics, Electrical Boat Division. 'Circular Cylindrical Shell with Bulkheads and Intermediate Stiffeners Subjected to Hydrostatic Pressure.' 22
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