The description of a beam element by only the displacement of its centerline leads to some difficulties in the representation of the torsion and shear effects. For instance such a representation does not capture the rotation of the beam as a rigid body about its own axis. This problem was circumvented in the literature by using a local coordinate system in the incremental finite element method or by using the multibody floating frame of reference formulation. The use of such a local element coordinate system leads to a highly nonlinear expression for the inertia forces as the result of the large element rotation. In this investigation, an absolute nodal coordinate formulation is presented for the large rotation and deformation analysis of three dimensional beam elements. This formulation leads to a constant mass matrix, and as a result, the vectors of the centrifugal and Coriolis forces are identically equal to zero. The formulation presented in this paper takes into account the effect of rotary inertia, torsion and shear, and ensures continuity of the slopes as well as the rotation of the beam cross section at the nodal points. Using the proposed formulation curved beams can be systematically modeled.
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December 2001
Technical Papers
Three Dimensional Absolute Nodal Coordinate Formulation for Beam Elements: Theory
Ahmed A. Shabana,
Ahmed A. Shabana
Department of Mechanical Engineering, University of Illinois at Chicago, 842 West Taylor St., Chicago, IL 60607-7022
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Refaat Y. Yakoub
Refaat Y. Yakoub
Department of Mechanical Engineering, University of Illinois at Chicago, 842 West Taylor St., Chicago, IL 60607-7022
Search for other works by this author on:
Ahmed A. Shabana
Department of Mechanical Engineering, University of Illinois at Chicago, 842 West Taylor St., Chicago, IL 60607-7022
Refaat Y. Yakoub
Department of Mechanical Engineering, University of Illinois at Chicago, 842 West Taylor St., Chicago, IL 60607-7022
Contributed by the Reliability Stress Analysis and Failure Prev. Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received May 2000. Associate Editor: J. Gao.
J. Mech. Des. Dec 2001, 123(4): 606-613 (8 pages)
Published Online: May 1, 2000
Article history
Received:
May 1, 2000
Citation
Shabana , A. A., and Yakoub, R. Y. (May 1, 2000). "Three Dimensional Absolute Nodal Coordinate Formulation for Beam Elements: Theory ." ASME. J. Mech. Des. December 2001; 123(4): 606–613. https://doi.org/10.1115/1.1410100
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