A computational strategy to establish algebraic parameters for the Reference Resistance Design of metal shell structures
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Published version
Author(s)
Sadowski, AJ
Fajuyitan, OK
Wang, J
Type
Journal Article
Abstract
The new Reference Resistance Design (RRD) method, recently developed by Rotter [1], for the manual dimensioning of metal shell structures effectively permits an analyst working with only a calculator or spreadsheet to take full advantage of the realism and accuracy of an advanced nonlinear finite element (FE) calculation. The method achieves this by reformulating the outcomes of a vast programme of parametric FE calculations in terms of six algebraic parameters and two resistances, each representing a physical aspect of the shell's behaviour.
The formidable challenge now is to establish these parameters and resistances for the most important shell geometries and load cases. The systems that have received by far the most research attention for RRD are that of a cylindrical shell under uniform axial compression and uniform bending. Their partial algebraic characterisations required thousands of finite element calculations to be performed across a four-dimensional parameter hyperspace (i.e. length, radius to thickness ratio, imperfection amplitude, linear strain hardening modulus).
Handling so many nonlinear finite element models is time-consuming and the quantities of data generated can be overwhelming. This paper illustrates a computational strategy to deal with both issues that may help researchers establish sets of RRD parameters for other important shell systems with greater confidence and accuracy. The methodology involves full automation of model generation, submission, termination and processing with object-oriented scripting, illustrated using code and pseudocode fragments.
The formidable challenge now is to establish these parameters and resistances for the most important shell geometries and load cases. The systems that have received by far the most research attention for RRD are that of a cylindrical shell under uniform axial compression and uniform bending. Their partial algebraic characterisations required thousands of finite element calculations to be performed across a four-dimensional parameter hyperspace (i.e. length, radius to thickness ratio, imperfection amplitude, linear strain hardening modulus).
Handling so many nonlinear finite element models is time-consuming and the quantities of data generated can be overwhelming. This paper illustrates a computational strategy to deal with both issues that may help researchers establish sets of RRD parameters for other important shell systems with greater confidence and accuracy. The methodology involves full automation of model generation, submission, termination and processing with object-oriented scripting, illustrated using code and pseudocode fragments.
Date Issued
2017-07-01
Date Acceptance
2017-02-27
Citation
Advances in Engineering Software, 2017, 109 (1), pp.15-30
ISSN
0965-9978
Publisher
Elsevier
Start Page
15
End Page
30
Journal / Book Title
Advances in Engineering Software
Volume
109
Issue
1
Copyright Statement
© 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC-BY license. (http://creativecommons.org/licenses/by/4.0/)
Sponsor
Engineering and Physical Sciences Research Council
Identifier
https://www.sciencedirect.com/science/article/pii/S0965997816307190?via%3Dihub
Grant Number
EP/N024060/1
Subjects
Science & Technology
Technology
Computer Science, Interdisciplinary Applications
Computer Science, Software Engineering
Engineering, Multidisciplinary
Computer Science
Engineering
Metal shell structures
Reference Resistance Design
Buckling
Plasticity
Finite element analysis
Automation
Object-oriented programming
ELASTIC CYLINDRICAL-SHELLS
STABILITY
BEHAVIOR
STEEL
CYLINDERS
PRESSURE
COLLAPSE
SILOS
08 Information and Computing Sciences
09 Engineering
Applied Mathematics
Publication Status
Published
Date Publish Online
2017-03-18