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Plastic load evaluation for a fixed tube sheet heat exchanger subject to proportional loading

Behseta, Khosrow and Mackenzie, Donald and Hamilton, Robert (2012) Plastic load evaluation for a fixed tube sheet heat exchanger subject to proportional loading. International Journal of Pressure Vessels and Piping, 92. pp. 11-18. ISSN 0308-0161

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      The plastic load of pressurised components can be calculated based on both the twice elastic slope and tangent methods. Both methods are problematic since they rely on parameters that are localised and therefore have a strong dependency on the gradient of the stress–strain diagram in the plastic region. The criterion of curvature of plastic work is a suitable replacement for the above techniques. This method calculates total plastic work done on the structure and relates its change to the curvature of the load-plastic work plot. In this work the plastic load has been calculated for a fixed tube sheet exchanger according to curvature criteria using various hardening scenarios. Plastic loads calculated by other methods also have been reported. It has been indicated that tube sheet thickness calculated according to the classical ASME procedure can be significantly reduced when based on the curvature criteria.

      Item type: Article
      ID code: 37043
      Keywords: plastic load, heat exchanger, fixed tube sheet , proportional loading, Mechanical engineering and machinery, Mechanical Engineering, Mechanics of Materials, Polymers and Plastics
      Subjects: Technology > Mechanical engineering and machinery
      Department: Faculty of Engineering > Mechanical and Aerospace Engineering
      Related URLs:
      Depositing user: Pure Administrator
      Date Deposited: 25 Jan 2012 09:55
      Last modified: 11 Feb 2015 22:13

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