Ensuring sufficient safety against shakedown or ratchet is a fundamental requirement of pressure vessel design. Determining the shakedown or ratchet boundary can however prove difficult when using a full elastic plastic finite element analysis and a number of direct methods have been proposed that overcome the difficulties associated with shakedown or ratchet boundary evaluation. Here a new direct lower bound shakedown method, which can be extended to a ratchet method, is proposed. The method maintains a constitutively accurate description of the assumed material response through the use of non-smooth multi yield surface plasticity models. The proposed shakedown method can consider arbitrary load cases and may be solved in a single analysis step in a standard finite element analysis with a user-programed non-smooth multi yield surface plasticity model. It is demonstrated that by maintaining a constitutively accurate description of the plastic strains the method is able to calculate strict lower bound shakedown boundaries. The resulting boundary is shown to give excellent agreement with the upper and lower bound linear matching method.
Skip Nav Destination
ASME 2013 Pressure Vessels and Piping Conference
July 14–18, 2013
Paris, France
Conference Sponsors:
- Pressure Vessels and Piping Division
- Nondestructive Evaluation Engineering Division
ISBN:
978-0-7918-5567-6
PROCEEDINGS PAPER
A New Constitutively Accurate Lower Bound Direct Shakedown Method
Alan Jappy,
Alan Jappy
University of Strathclyde, Glasgow, UK
Search for other works by this author on:
Donald Mackenzie,
Donald Mackenzie
University of Strathclyde, Glasgow, UK
Search for other works by this author on:
Haofeng Chen
Haofeng Chen
University of Strathclyde, Glasgow, UK
Search for other works by this author on:
Alan Jappy
University of Strathclyde, Glasgow, UK
Donald Mackenzie
University of Strathclyde, Glasgow, UK
Haofeng Chen
University of Strathclyde, Glasgow, UK
Paper No:
PVP2013-97049, V003T03A067; 6 pages
Published Online:
January 17, 2014
Citation
Jappy, A, Mackenzie, D, & Chen, H. "A New Constitutively Accurate Lower Bound Direct Shakedown Method." Proceedings of the ASME 2013 Pressure Vessels and Piping Conference. Volume 3: Design and Analysis. Paris, France. July 14–18, 2013. V003T03A067. ASME. https://doi.org/10.1115/PVP2013-97049
Download citation file:
15
Views
Related Proceedings Papers
Related Articles
Fitness-for-Service Methodology Based on Variational Principles in Plasticity
J. Pressure Vessel Technol (February,2005)
Fatigue Analysis in Pressure Vessel Design by Local Strain Approach: Methods and Software Requirements
J. Pressure Vessel Technol (February,2006)
Process Piping Design: A Century of Progress
J. Pressure Vessel Technol (August,2000)
Related Chapters
Background Information
Guidebook for the Design of ASME Section VIII Pressure Vessels, Third Edition
Background InformatIon
Guidebook for the Design of ASME Section VIII Pressure Vessels
Subsection NB—Class 1 Components
Companion Guide to the ASME Boiler & Pressure Vessel Codes, Volume 1 Sixth Edition