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Characterising gross plastic deformation in design by analysis

Li, H. and Mackenzie, D. (2005) Characterising gross plastic deformation in design by analysis. International Journal of Pressure Vessels and Piping, 82 (10). pp. 777-786. ISSN 0308-0161

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An investigation of three simple structures is conducted to identify and characterise the condition of gross plastic deformation in pressure vessel design by analysis. Limit analysis and bilinear hardening plastic analysis is performed for three simple example problems. It is found that previously proposed plastic criteria do not fully represent the effect of the hardening material model on the development of the plastic failure mechanism. A new criterion of plastic collapse based on the curvature of the load–plastic work history is therefore proposed. This is referred to as the Plastic Work Curvature or PWC criterion. It is shown that salient points of curvature correspond to critical stages in the physical evolution of the gross plastic deformation mechanism. The PWC criterion accounts for the effect of the bilinear hardening model on the development of the plastic mechanism and gives an enhanced plastic load when compared to the limit load.

Item type: Article
ID code: 5692
Keywords: plastic, plastic deformation, design, analysis, plastic work curvature, 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
Depositing user: Strathprints Administrator
Date Deposited: 22 Mar 2008
Last modified: 07 Oct 2015 14:49

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