Variational formulation of the static Levinson beam theory
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In this communication, we provide a consistent variational formulation for the static Levinson beam theory. First, the beam equations according to the vectorial formulation by Levinson are reviewed briefly. By applying the Clapeyron's theorem, it is found that the stresses on the lateral end surfaces of the beam are an integral part of the theory. The variational formulation is carried out by employing the principle of virtual displacements. As a novel contribution, the formulation includes the external virtual work done by the stresses on the end surfaces of the beam. This external virtual work contributes to the boundary conditions in such a way that artificial end effects do not appear in the theory. The obtained beam equations are the same as the vectorially derived Levinson equations. Finally, the exact Levinson beam finite element is developed. (C) 2015 Elsevier Ltd. All rights reserved.
|Number of pages||5|
|Journal||MECHANICS RESEARCH COMMUNICATIONS|
|Publication status||Published - Jun 2015|
|MoE publication type||A1 Journal article-refereed|
- Levinson beam, Interior beam, Variational formulation, Finite element, PLATES, STABILITY