Elasto-plastic analysis of thick plates
- Univ. of Montreal, Quebec (Canada)
This study is a contribution to the analysis and design of thick-walled plates that may be used in high pressure vessel applications. The criteria given in the ASME Pressure Vessel Code, Section VIII, Divisions 1 and 2, could be used in designing thin flat heads that are usually employed in vessels for a relatively low pressure levels. The limiting ratio of plate thickness to outside diameter for which the ASME procedure apply is not clearly defined. If this ratio is high enough to a point where the cover must be considered as a thick-walled component, then other criteria must be used to calculate a reasonable design thickness under a high pressure loading. A safety factor applied on the collapse load seems to be the most attractive way of designing thick-walled structures. In this paper, analytical and finite element methods are used to investigate the elastic (for thin and thick) and elasto-plastic (for thick) behavior of circular plates subjected to a uniform pressure. Two different boundary conditions are considered, simply supported and built-in around the outside circumference. These two particular limiting cases should provide a good understanding of the plate behavior in real structures. For comparison purposes, some of the elasto-plastic finite element results obtained previously by the first author on thick-walled vessels with blind-end, are presented and discussed. It is hoped that the results of this study would clarify some aspects to the design of thick-walled high pressure vessels with flat heads.
- OSTI ID:
- 403338
- Report Number(s):
- CONF-960706--; ISBN 0-7918-1782-2
- Country of Publication:
- United States
- Language:
- English
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