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GBT-based cross-section deformation modes for curved thin-walled members with circular axis.
- Source :
-
Thin-Walled Structures . Jun2018, Vol. 127, p769-780. 12p. - Publication Year :
- 2018
-
Abstract
- This paper presents an improvement of the first-order Generalised Beam Theory (GBT) formulation proposed in [1] , which was developed for naturally curved thin-walled members with deformable cross-section and whose undeformed axis is a circular arc with no pre-twist. In this paper, the restrictions on the cross-section shape are removed (in the previous paper only rather simple cross-sections were dealt with) by proposing and discussing a novel and systematic procedure to obtain the cross-section deformation modes for arbitrary flat-walled cross-sections (open, closed or “mixed”). The proposed procedure retains the nomenclature of the deformation mode subsets defined in [2,3] , even though the kinematic constraints employed to subdivide the modes are much more complex than for prismatic members. A set of representative illustrative examples is presented, involving complex local-distortional-global deformation, to show the efficiency of the proposed procedure when used together with a standard displacement-based GBT finite element. It is demonstrated that extremely accurate results are obtained with rather few DOFs and that the GBT modal solution provides in-depth insight into the structural behaviour of naturally curved members. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02638231
- Volume :
- 127
- Database :
- Academic Search Index
- Journal :
- Thin-Walled Structures
- Publication Type :
- Academic Journal
- Accession number :
- 129207132
- Full Text :
- https://doi.org/10.1016/j.tws.2018.03.008