Article (Scientific journals)
Geometrically exact thin-walled beam including warping formulated on the special Euclidean group SE(3)
Rong, Jili; Wu, Zhipei; Liu, Cheng et al.
2020In Computer Methods in Applied Mechanics and Engineering, 369, p. 113062
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Keywords :
Geometrically exact thin-walled beam; Special Euclidean group; Warping; Wagner effect; Isogeometric analysis; Dynamic analysis
Abstract :
[en] Based on a formulation on the special Euclidean group SE(3), a geometrically exact thin-walled beam with an arbitrary open cross-section is proposed to deal with the finite deformation and rotation issues. The beam strains are based on a kinematic assumption where warping deformation and Wagner effects are included such that the nonlinear behavior of a thin-walled beam is predicted accurately, particular under large torsion. To reduce the nonlinearity of rigid motion, static and dynamic equations are derived in the SE(3) framework based on the local frame approach. As the value of the iteration matrix, including the Jacobian matrix of inertial and internal forces, is invariable under arbitrary rigid motion, the number of updates required during the computation process decreases sharply, which drastically improves the computational efficiency. Furthermore, the isogeometric analysis (IGA) based on the non-uniform rational B-splines (NURBS) basis functions, which promotes the integration of computer-aided design (CAD) and computer-aided engineering (CAE), is adopted to interpolate the displacement, rotation, and warping fields separately. The interpolated strain measures satisfy the objectivity by removing the rigid motion of the reference point. To obtain the symmetric Jacobian matrix of internal forces, the linearization operation is conducted based on the previously converged configuration. A Lie group SE(3) extension of the generalized-α time integration method is utilized to solve the equations of motion for thin-walled beams. Finally, the proposed formulation is successfully tested and validated in several static and dynamic numerical examples.
Disciplines :
Mechanical engineering
Author, co-author :
Rong, Jili
Wu, Zhipei
Liu, Cheng
Bruls, Olivier  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques
Language :
English
Title :
Geometrically exact thin-walled beam including warping formulated on the special Euclidean group SE(3)
Publication date :
2020
Journal title :
Computer Methods in Applied Mechanics and Engineering
ISSN :
0045-7825
eISSN :
1879-2138
Publisher :
Elsevier, Amsterdam, Netherlands
Volume :
369
Pages :
113062
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 June 2020

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