Article (Scientific journals)
A general purpose formulation for nonsmooth dynamics with finite rotations: Application to the woodpecker toy
Cosimo, Alejandro; Cavalieri, Federico J.; Galvez, Javier et al.
2021In Journal of Computational and Nonlinear Dynamics, 16 (3), p. 031001-1
Peer reviewed
 

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Keywords :
Equations of motion; Toys; Finite element codes; Finite rotations; Frictional contact; Horizontal displacements; Multi-body dynamic; Non-smooth dynamics; Simulation code; Unilateral constraints; Rotation
Abstract :
[en] The aim of this work is to extend the finite element multibody dynamics approach to problems involving frictional contacts and impacts. The nonsmooth generalized-α (NSGA) scheme is adopted, which imposes bilateral and unilateral constraints both at position and velocity levels avoiding drift phenomena. This scheme can be implemented in a general purpose simulation code with limited modifications of pre-existing elements. The study of the woodpecker toy dynamics sets up a good example to show the capabilities of the NSGA scheme within the context of a general finite element framework. This example has already been studied by many authors who generally adopted a model with a minimal set of coordinates and small rotations. It is shown that good results are obtained using a general purpose finite element code for multibody dynamics, in which the equations of motion are assembled automatically and large rotations are easily taken into account. In addition, comparing results between different models of the woodpecker toy, the importance of modeling large rotations and the horizontal displacement of the woodpecker's sleeve is emphasized. Copyright © 2021 by ASME.
Disciplines :
Mechanical engineering
Author, co-author :
Cosimo, Alejandro;  Department of Aerospace and Mechanical Engineering, University of Liège, Allée de la Découverte 9 (B52), Liège, 4000, Belgium, Cimec, Universidad Nacional Del Litoral, Conicet, Colectora Ruta Nac.168, Paraje El Pozo, Santa Fe, 3000, Argentina
Cavalieri, Federico J.;  Cimec, Universidad Nacional Del Litoral, Conicet, Colectora Ruta Nac.168, Paraje El Pozo, Santa Fe, 3000, Argentina
Galvez, Javier;  Department of Aerospace and Mechanical Engineering, University of Liège, Allée de la Découverte 9 (B52), Liège, 4000, Belgium
Cardona, Alberto;  Cimec, Universidad Nacional Del Litoral, Conicet, Colectora Ruta Nac.168, Paraje El Pozo, Santa Fe, 3000, Argentina
Bruls, Olivier  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques
Title :
A general purpose formulation for nonsmooth dynamics with finite rotations: Application to the woodpecker toy
Publication date :
2021
Journal title :
Journal of Computational and Nonlinear Dynamics
ISSN :
1555-1415
eISSN :
1555-1423
Publisher :
American Society of Mechanical Engineers (ASME), United States
Volume :
16
Issue :
3
Pages :
031001-1
Peer reviewed :
Peer reviewed
Available on ORBi :
since 17 January 2022

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