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Title: N-BAR PROBLEMS AS APPROXIMATIONS TO THE BREE PROBLEM

Abstract

The Bree solution to the problem of a ratcheting cylinder under constant pressure and cyclic thermal load is a fundamental result in nuclear engineering and widely used as the technical basis for the ASME Boiler and Pressure Vessel Code and other design methods. However, because the loading conditions in the Bree problem are difficult to achieve experimentally there have been relatively few works experimentally examining the problem and extending it to other relevant design situations, for example cladded components. In contrast, 2-bar problems are widely studied experimentally and are relatively easy to setup. These 2-bar problems are thought to be representative of Bree-type geometries, but a formal connection has not been demonstrated. This work formally establishes the connection between the Bree cylinder and an n-bar problem – a coupled bar experiment with, in general, more than two bars linked in parallel. The connection suggests that n-bar experiments using a fairly limited number of bars might be an experimentally-accessible setup that better represents ratcheting phenomenon in actual nuclear pressurized components. Such experiments could test surrogate cladded or multi-material components by using bars of different materials. Finally, this work suggests control schemes that yield optimally efficient n-bar experiments – experiments that bestmore » replicates a Bree cylinder with a limited number of bars.« less

Authors:
 [1];  [1]; ORCiD logo [2]
  1. Argonne National Laboratory (ANL)
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1474442
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: ASME Pressure Vessels and Piping Conference (PVP 2018) - Prague, , Czech Republic - 7/15/2018 4:00:00 AM-7/20/2018 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Messner, Mark C., Sham, T.-L., and Wang, Yanli. N-BAR PROBLEMS AS APPROXIMATIONS TO THE BREE PROBLEM. United States: N. p., 2018. Web.
Messner, Mark C., Sham, T.-L., & Wang, Yanli. N-BAR PROBLEMS AS APPROXIMATIONS TO THE BREE PROBLEM. United States.
Messner, Mark C., Sham, T.-L., and Wang, Yanli. 2018. "N-BAR PROBLEMS AS APPROXIMATIONS TO THE BREE PROBLEM". United States. https://www.osti.gov/servlets/purl/1474442.
@article{osti_1474442,
title = {N-BAR PROBLEMS AS APPROXIMATIONS TO THE BREE PROBLEM},
author = {Messner, Mark C. and Sham, T.-L. and Wang, Yanli},
abstractNote = {The Bree solution to the problem of a ratcheting cylinder under constant pressure and cyclic thermal load is a fundamental result in nuclear engineering and widely used as the technical basis for the ASME Boiler and Pressure Vessel Code and other design methods. However, because the loading conditions in the Bree problem are difficult to achieve experimentally there have been relatively few works experimentally examining the problem and extending it to other relevant design situations, for example cladded components. In contrast, 2-bar problems are widely studied experimentally and are relatively easy to setup. These 2-bar problems are thought to be representative of Bree-type geometries, but a formal connection has not been demonstrated. This work formally establishes the connection between the Bree cylinder and an n-bar problem – a coupled bar experiment with, in general, more than two bars linked in parallel. The connection suggests that n-bar experiments using a fairly limited number of bars might be an experimentally-accessible setup that better represents ratcheting phenomenon in actual nuclear pressurized components. Such experiments could test surrogate cladded or multi-material components by using bars of different materials. Finally, this work suggests control schemes that yield optimally efficient n-bar experiments – experiments that best replicates a Bree cylinder with a limited number of bars.},
doi = {},
url = {https://www.osti.gov/biblio/1474442}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jul 01 00:00:00 EDT 2018},
month = {Sun Jul 01 00:00:00 EDT 2018}
}

Conference:
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