An initially deformed flat frame finite element

• Autorzy: Zamorowski J.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the author’s non-linear FEM solution of an initially stressless deformed flat frame element, in which the nodes are situated along the axis of the bar initially straight. It has been assumed that each node may sustain arbitrary displacements and rotation. The solution takes into account the effect of shear, the geometrical non-linearity with large displacements (Green-Lagrange’s strain tensor) and moderate rotations (i.e. such ones which allow a linear-elastic behaviour of the material) and alternative small rotations when the second Piola-Kirchhoff stress tensor is applied. This solution is based on [1], concerning beams without any initial bow imperfections. The convergence of the obtained results at different numbers of nodes and Gauss points in the element was tested basing on the example of circular arcs with a central angle of 120º-180º. The analysis concerned elements with two, three, five, seven, nine and eleven nodes, for the same number of points of numerical integration and also with one more or less. Moreover, the effect of distributing the load on the convergence of the results was analyzed.

Słowa kluczowe

EN

initial deformation; flat frame; geometrical nonlinearity; large displacements; large rotation; small rotation; finite element method

PL

deformacja początkowa; rama płaska; nieliniowość geometryczna; przemieszczenie duże; obrót duży; obrót mały; metoda elementów skończonych

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2013
• Tom: Vol. 59, nr 3
• Strony: 381--400
• Opis fizyczny: Bibliogr. 23 poz., il., tab.

Twórcy

autor

Zamorowski J.

• Silesian University of Technology in Gliwice, Faculty of Civil Engineering

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