Fatigue life estimates of automotive structures are often obtained using stress estimated from static solution methods such as inertia relief [1, 2]. This approach can provide reliable results if the natural frequencies of the system are at least twice that of the highest loading frequency. Direct and modal transient fatigue approaches would include dynamic effects but are not practical due to increased computer resource requirements.This paper outlines a modified modal superposition based transient method. In this method, modal stress is obtained using a commercial FEA code. The transient solution is then obtained externally to significantly reduce computer requirements. Additionally, a numerical procedure is outlined which is capable of incorporating non-zero initial conditions for increased accuracy.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    New Approaches to Modal Transient Fatigue Analysis


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Truck & Bus Meeting & Exposition ; 2000



    Publication date :

    2000-12-04




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    New approaches to modal transient fatigue analysis

    Vellaichamy,S. / Keshtkar,H. / DaimlerChrysler,US | Automotive engineering | 2000


    Transient dynamic fatigue analysis using inertia relief approach with modal resonance augmentation

    Vellaichamy,S. / DaimlerChrysler,US | Automotive engineering | 2002



    Application of modal transient dynamics to calculate body fatigue life

    Jordan,D. / General Motors,US | Automotive engineering | 2001