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Consideration of the resonance effects in the fatigue analysis of the body in white

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  • Calculation and Simulation
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Abstract

In the development of the body in white (BIW) the fatigue evaluation is an important building block in ensuring the functional characteristics. Due to the continuously increasing time and cost pressure in vehicle development, a reliable fatigue evaluation based on digital methods is absolutely essential. Yet the current methods cannot sufficiently consider the dynamic effects which are induced by the natural vibrations. Components with concentrated masses are mostly affected by this shortcoming. Hence, proper dimensioning of the connections of these com ponents based on digital methods involves considerable risks at present. In order to fill this gap, a calculation method has been developed by Mercedes-Benz and the Fraunhofer Institute LBF, which takes the dynamic effects into account via superposition of the modal stresses. The procedure will be presented in this article using the example of a motor pump unit.

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Authors and Affiliations

  1. Mercedes-Benz Cars Development, Sindelfingen, Germany

    Serter Atamer (postgraduate) &  Dirk Barenbrock (head of the „CAE Betriebsfestigkeit für große Baureihen“)

  2. Mercedes-Benz Research and Development, India

    Christophe Ageorges (head of the Engineering Services)

  3. Fraunhofer-Institut für Betriebsfestigkeit und Systemzuverlässigkeit LBF, Darmstadt, Germany

    Cetin Morris Sonsino (head of the section Automotive)

Authors
  1. Serter Atamer
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  2. Dirk Barenbrock
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  3. Christophe Ageorges
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  4. Cetin Morris Sonsino
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Atamer, S., Barenbrock, D., Ageorges, C. et al. Consideration of the resonance effects in the fatigue analysis of the body in white. ATZ Worldw 110, 26–30 (2008). https://doi.org/10.1007/BF03225205

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  • DOI: https://doi.org/10.1007/BF03225205

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