NDLI: Fidelity of the integrated force method solution

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Fidelity of the integrated force method solution

Content Provider	NASA Technical Reports Server (NTRS)
Author	Halford, Gary Coroneos, Rula Patnaik, Surya Hopkins, Dale
Copyright Year	2002
Description	The theory of strain compatibility of the solid mechanics discipline was incomplete since St. Venant's 'strain formulation' in 1876. We have addressed the compatibility condition both in the continuum and the discrete system. This has lead to the formulation of the Integrated Force Method. A dual Integrated Force Method with displacement as the primal variable has also been formulated. A modest finite element code (IFM/Analyzers) based on the IFM theory has been developed. For a set of standard test problems the IFM results were compared with the stiffness method solutions and the MSC/Nastran code. For the problems IFM outperformed the existing methods. Superior IFM performance is attributed to simultaneous compliance of equilibrium equation and compatibility condition. MSC/Nastran organization expressed reluctance to accept the high fidelity IFM solutions. This report discusses the solutions to the examples. No inaccuracy was detected in the IFM solutions. A stiffness method code with a small programming effort can be improved to reap the many IFM benefits when implemented with the IFMD elements. Dr. Halford conducted a peer-review on the Integrated Force Method. Reviewers' response is included.
File Size	3706404
Page Count	34
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20020039139
Archival Resource Key	ark:/13960/t1pg6mx6t
Language	English
Publisher Date	2002-01-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Solid Mechanics Finite Element Method Numerical Integration Strain Distribution Equilibrium Equations Continuum Mechanics Stiffness Force Distribution Nastran Compatibility Displacement Structural Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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