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CILINDROS DE PAREDES DELGADAS SOMETIDOS A COMPRESION Y PRESION INTERNACILINDROS A COMPRESION1) Estado <strong>de</strong> equilibrio <strong>de</strong> una lámina cilíndrica:Si tomamos un diferencial <strong>de</strong> placa cilíndrica dθ dx, po<strong>de</strong>mos plantear las 6ecuaciones <strong>de</strong> equilibrio <strong>de</strong>l diferencial cargado <strong>con</strong> una carga uniforme q (figura 1.1).Figura 1.11.1)r Nx N z 2∂ ∂ ϕ ∂ w v v wwrQx rNxϕ ∂ 2Qϕ ∂ 2∂Nϕ∂ 2∂∂x + ∂ϕ− ∂x− ∂x− ⎛∂x+⎞ ⎛ ⎞22 ⎜ ⎟ − ⎜ − ⎟ = 0⎝ ∂∂ϕ x ⎠ ⎝∂∂ϕx ∂x⎠1.2)∂Nϕ∂ ϕ ∂ ∂ ∂ϕ∂ ∂r Nx 22 2v ⎛ v w ⎞ ⎛ v w⎞+ + rNx 2− Qx⎜+ ⎟ + N x⎜− ⎟∂ϕ ∂x∂x⎝∂x∂∂ϕ x ⎠ ⎝∂∂ϕx ∂x⎠2⎛ ∂v∂ w ⎞− Qϕ⎜1+ +2 ⎟ = 0⎝ r∂ϕr∂ϕ⎠1.3)∂r Qx∂x∂Qϕv w wvNxϕ ∂ 2 2⎛ ∂ ⎞ ∂∂+ + ⎜ + rNx Nϕ∂ϕ ⎝∂x∂∂ϕ x ⎠⎟ + ∂x+ ⎛⎜⎝+ r∂ϕ+21v wNϕx∂ 2⎛ ∂ ⎞+ ⎜ + ⎟ + qr = 0⎝∂x∂∂ϕ x ⎠2∂ w ⎞2 ⎟r∂ϕ⎠Página 2 <strong>de</strong> 25

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