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Lower and Upper Bound Shakedown Analysis of Structures With Temperature-Dependent Yield Stress

[+] Author Affiliations
Haofeng Chen

University of Strathclyde, Glasgow, UK

Paper No. PVP2009-77194, pp. 273-281; 9 pages
doi:10.1115/PVP2009-77194
From:
  • ASME 2009 Pressure Vessels and Piping Conference
  • Volume 2: Computer Applications/Technology and Bolted Joints
  • Prague, Czech Republic, July 26–30, 2009
  • Conference Sponsors: Pressure Vessels and Piping
  • ISBN: 978-0-7918-4365-9 | eISBN: 978-0-7918-3854-9
  • Copyright © 2009 by ASME

abstract

Based upon the kinematic theorem of Koiter, the Linear Matching Method (LMM) procedure has been proved to produce very accurate upper bound shakedown limits. This paper presents a recently developed LMM lower bound procedure for shakedown analysis of structures with temperature-dependent yield stress, which is implemented into ABAQUS using the same procedure as for upper bounds. According to the Melan’s theorem, a direct algorithm has been carried out to determine the lower bound of shakedown limit using the best residual stress field calculated during the LMM upper bound procedure with displacement-based finite elements. By checking the yield condition at every integration point, the lower bound is calculated by the obtained static field at each iteration, with the upper bound given by the obtained kinematic field. A number of numerical examples confirm the applicability of this procedure and ensure that the upper and lower bounds are expected to converge to the theoretical solution after a number of iterations.

Copyright © 2009 by ASME

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