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The use of bubble functions for the post‐local buckling of plate assemblies by the finite strip method
Author(s) -
Azhari M.,
Bradford M. A.
Publication year - 1995
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.1620380606
Subject(s) - buckling , bubble , finite strip method , bending , imperfect , convergence (economics) , degrees of freedom (physics and chemistry) , finite element method , compression (physics) , mathematics , mechanics , mathematical analysis , structural engineering , materials science , physics , engineering , composite material , linguistics , philosophy , quantum mechanics , economics , economic growth
The finite strip displacement functions for post‐local buckling are augmented with so‐called bubble functions, which are extra modes associated with internal or nodeless degrees of freedom. A non‐linear finite strip method of analysis including bubble functions is described for the post‐local buckling of geometrically imperfect plate assemblies. It is shown that the use of bubble functions improves significantly the convergence of the method. The non‐linear finite strip method is then used to study channel and I‐section members in compression and bending.