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A Virtual Multibody and Finite Element Analysis Environment in the Field of Aerospace Crashworthiness

  • H. M. Lankarani
  • G. Olivares
  • H. Nagarajan
Part of the NATO ASI Series book series (NAII, volume 103)

Abstract

One important concept in crashworthiness analysis is how the contact/impact is treated or modeled. One method for predicting the impact response of multibody mechanical systems is to treat the local deformations as well as the contact forces as continuous. The application of this method requires the knowledge of the variation of the contact and frictional forces. Contact force models, including nonlinear visco-elastic, Hertzian-based, and visco-plastic models are presented. Computer-aided analysis tools typically used in the studies of the aircraft crashworthiness are then described. A methodology is then presented for the entire design cycle from airframe to the cabin, seat, restraint and egress system. The methodology incorporates a combination of multibody modeling and non-linear finite element analysis of the airframe, seat and the occupant as well as component testing in early design stages, and sled and/or full-scale testing in later stages of design evaluations. A Virtual Reality (VR) system is utilized for effective system visualization and to better understand the interaction between the various subsystems. Examples of the use of this methodology for some of the current crash safety issues are presented.

Keywords

Contact Force Multibody System Head Impact Evacuation System Head Injury Criterion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • H. M. Lankarani
    • 1
  • G. Olivares
    • 1
  • H. Nagarajan
    • 1
  1. 1.National Institute for Aviation ResearchWichita State UniversityWichitaUSA

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