This paper presents a combination of different simulation techniques combining the particular advantages of linear Finite Element Analyses (FEA) with nonlinear Multi-Body Simulation (MBS) and Fatigue Software in order to perform an accurate fatigue lifetime prediction for crankshafts. When performing calculations with combustion engines, the crankshaft is one of the most critically loaded components. Due to an improved modal stress calculation procedure SIMPACK LOADS Durability saves both, a huge amount of computation times and hardware resources when compared with a transient finite element analysis. This enables the user to perform durability analysis over longer simulation periods even in the case of detailed finite element models and multi-body system models, respectively. The inclusion of fatigue analysis in a MBS simulation offers new perspectives in the CAE and development process. Virtual prototypes can be tested on a SIMPACK test rig or an entire vehicle model before going into production. Since the process can be performed in short computation times, it will allow optimisation of components of mechanical systems regarding fatigue life. The current focus, which is set to the relative fatigue life enables durability calculations, whose results reflect the improvements of component or the vehicle systems, respectively. At present the calculation of absolute fatigue life remains difficult. Nevertheless the future goal is to achieve better approximation of the absolute fatigue life time.


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    Title :

    Crankshaft durability calculation using a combination of MBS, FEA and fatigue software


    Additional title:

    Lebensdauerberechnung von Kurbelwellen mit Hilfe einer Kombination aus Mehrkörpersimulation, Finite-Elemente-Methode und Ermüdungs-Software


    Contributors:
    Berki, Dino (author)


    Publication date :

    2007


    Size :

    11 Seiten, 4 Bilder, 5 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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