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Characterising plastic collapse of pipe bend structures

Li, Hongjun and Mackenzie, Donald (2006) Characterising plastic collapse of pipe bend structures. International Journal of Pressure Vessels and Piping, 83 (2). pp. 85-95. ISSN 0308-0161

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      Abstract

      Two recently proposed design by analysis criteria of plastic collapse based on plastic work concepts, the plastic work (PW) criterion and the plastic work curvature (PWC) criterion, are applied to a strain hardening pipe bend arrangement subject to combined pressure and in-plane moment loading. Calculated plastic pressure-moment interaction surfaces are compared with limit surfaces, large deformation analysis instability surfaces and plastic load surfaces given by the ASME Twice Elastic Slope criterion and the tangent intersection criterion. The results show that both large deformation theory and material strain hardening have a significant effect on the elastic-plastic response and calculated static strength of the component. The PW criterion is relatively simple to apply in practice and gives plastic load values similar to the tangent intersection criterion. The PWC criterion is more subjective to apply in practice but it allows the designer to follow the development of the gross plastic deformation mechanism in more detail. The PWC criterion indicates a more significant strain hardening strength enhancement effect than the other criteria considered, leading to a higher calculated plastic load.

      Item type: Article
      ID code: 6089
      Keywords: pipe bends, gross plastic deformation, plastic load, criterion of plastic collapse, Mechanical engineering and machinery, Mechanics of Materials, Materials Science(all), Mechanical Engineering
      Subjects: Technology > Mechanical engineering and machinery
      Department: Faculty of Engineering > Mechanical and Aerospace Engineering
      Related URLs:
      Depositing user: Strathprints Administrator
      Date Deposited: 19 May 2008
      Last modified: 17 Sep 2014 04:27
      URI: http://strathprints.strath.ac.uk/id/eprint/6089

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