Multibody System Dynamics

, Volume 15, Issue 1, pp 67–84 | Cite as

Modeling Spatial Motion of 3D Deformable Multibody Systems with Nonlinearities

  • Yu. Vetyukov
  • J. Gerstmayr
  • H. Irschik


A computational strategy for modeling spatial motion of systems of flexible spatial bodies is presented. A new integral formulation of constraints is used in the context of the floating frame of reference approach. We discuss techniques to linearize the equations of motion both with respect to the kinematical coupling between the deformation and rigid body degrees of freedom and with respect to the geometrical nonlinearities (inclusion of stiffening terms). The plastic behavior of bodies is treated by means of plastic multipliers found as the result of fixed-point type iterations within a time step. The time integration is based on implicit Runge Kutta schemes with arbitrary order and of the RadauIIA type. The numerical results show efficiency of the developed techniques.


constraint linearization integral constraints geometrical stiffening elasto-plasticity 


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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Institute for Technical Mechanics and Machine Design, Division of Technical MechanicsJohannes Kepler University of LinzLinzAustria

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