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009064
2024-10-11

VE0064 | Recipiente de pared gruesa

Descripción del trabajo

Un recipiente de paredes gruesas está cargado por una presión interna y externa. The vessel is open-ended, thus there is no axial stress. The problem is modeled as a quarter model. Determine the radial deflection of the inner and outer radius ur(r1), ur(r2). Se omite el peso propio.

Material Elastic Módulo de elasticidad E 1.000 MPa
Poisson´s Ratio ν 0.250 -
Geometry Inner Radius r1 200.000 mm
Outer Radius r2 300.000 mm
Load Inner Pressure p1 60.000 kPa
Outer Pressure p2 10.000 kPa

Solución analítica

The stress state of the thick-walled vessel is described by the equation of equilibrium

Using strain-deflection equations and Hooke´s Law, second-order differential equation is obtained

The solution leads to the radial stress σr and tangential stress σt.

Constants K and C are obtained using boundary conditions.

The radial deflection of the inner and outer radius of the open-ended vessel ur(r1), ur(r2) can be determined using the following equations:

RFEM Settings

  • Modeled in RFEM 5.06 and RFEM 6.06
  • The element size is lFE = 2.000 mm
  • Isotropic linear elastic material model is used

Resultados

Quantity Solución analítica RFEM 6 Razón RFEM 5 Razón
ur(r1) [mm] 27.000 26.998 1.000 27.000 1.000
ur(r2) [mm] 21.750 21.747 1.000 21.750 1.000


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