The combination of fibre volume fraction, fibre orientation and lay-up sequence in composite materials makes it possible to design a multitude of composite pressure vessels and pipes. Analytical models, based on the classical laminate theory and numerical predictive techniques offer a means to optimize the lay-up sequence in order to maximize the strength to weight / cost ratio. This study looks at the validity of using analytical models prescribed in the design by analysis filament wound composite standards and compares the results with realistic test and numerical models. The results show that the classical laminate theory accurately establishes the design load in symmetric and balanced lay-up laminates when appropriate material properties are assigned. However in the case of asymmetric or unbalanced lay-up sequences, the bending and twisting stiffness geometrically strengthens the pipes such that the classical hoop and axial loading conditions based on isotropic material properties, no longer apply. In such instances the analytical solutions can underestimate the design load by more than 33%. An analytical solution that accurately establishes the loading configuration and magnitude is required. On the other hand numerical models gave good agreement with the experimental test results immaterial of the lay-up sequences, when appropriate end coupling, pressure loading and material properties are applied.
ASME 2014 Pressure Vessels and Piping Conference
July 20–24, 2014
Anaheim, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4600-1
PROCEEDINGS PAPER
Design-by-Analysis Methods for Asymmetric or Unbalanced Cylindrical Composite Pressure Vessels
Duncan Camilleri
,
Duncan Camilleri
University of Malta, Msida, Malta
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Brian Ellul
,
Brian Ellul
University of Malta, Msida, Malta
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Martin Muscat
Martin Muscat
University of Malta, Msida, Malta
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Author Information
Duncan Camilleri
University of Malta, Msida, Malta
Brian Ellul
University of Malta, Msida, Malta
Martin Muscat
University of Malta, Msida, Malta
Paper No:
PVP2014-28130, V003T03A011; 8 pages
Published Online:
November 18, 2014
Citation
Camilleri, Duncan, Ellul, Brian, and Muscat, Martin. "Design-by-Analysis Methods for Asymmetric or Unbalanced Cylindrical Composite Pressure Vessels." Proceedings of the ASME 2014 Pressure Vessels and Piping Conference. Volume 3: Design and Analysis. Anaheim, California, USA. July 20–24, 2014. V003T03A011. ASME. https://doi.org/10.1115/PVP2014-28130
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