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Benchmark Cases - Underwater tank

  • Open composite cylinders can be simulated with ESAComp. As a special case, the tool can be applied for simulating pressure vessels.
  • A constant pressure load can be applied on the surfaces of the shell. This induces hoop forces and bending at the ends of the shell. The pressure vessel option sets automatically the axial membrane forces that correspond to the reaction force from the virtual end plate or end cap.
  • Both ends can be mounted rigidly, but a more realistic approach is obtained when the other end is free. This is particularly important for the stability analysis to allow axial deformation. To prevent radial deformation, a steel ring idealizing the end plate can be added.
  • The benchmark case [1] involves the study of the buckling for various thick (R/t ~20) carbon composite wound tanks. The ESAComp results are in line with the published data. ESAComp predicts on average 12% higher buckling loads for the 3 tanks when using simulation results as the reference. The reference models had a flat end plate. The deviation from the test results was 33%.

  • Reference:
    [1] Buckling of filament-wound composite cylinders subjected to hydrostatic pressure for underwater vehicle applications, Moon C-J, Kim I-H, Choi B-H, Kweon J-H, Choi J-H, Composite Structures 92 (2010) 2241–2251

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