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A cost comparison of two static condensation‐stress recovery algorithms
Author(s) -
Cook Robert D.,
Shah Vikram N.
Publication year - 1978
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620120403
Subject(s) - computation , degrees of freedom (physics and chemistry) , finite element method , condensation , stress (linguistics) , algorithm , internal stress , computer science , element (criminal law) , mathematical optimization , structural engineering , mathematics , engineering , materials science , physics , linguistics , philosophy , law , political science , composite material , thermodynamics , quantum mechanics
We consider finite elements that have internal degrees‐of‐freedom. These d.o.f. are condensed before elements are assembled into the structure, and must be recovered later for use in element stress computation. References 1 and 2 describe two different ways to do the calculations. This paper compares the computational costs of the two methods. Test runs were made to assess costs. Relative costs depend on several factors. The factors are discussed, and suggestions are made as to the better method in various circumstances.