The paper presents numerical and experimental verification of an equivalent model of a disc-spring valve system widely used in automotive shock absorbers. Findings of this research and validation work constitute a basis for dynamical validation of methods for predicting performance and fatigue of a valve system that will be published at a later date. Valve system models were developed for the purpose of gaming, synthesizing and generalizing the knowledge concerning particular valve systems. On the other hand, the valve model can be utilized in a valve system pre-selection process that facilitates lowering of required testing capacity, i.e., the number of long-term and expensive fatigue tests performed on hydraulic testing machines. Three valve system models, referred to as simplified linear, simplified non-linear and advanced non-linear, have been considered and built. Simplified linear and simplified non-linear models are stated in an explicit form as a set of equations derived from the theory of bending circular plates for small and large plate deflections, respectively (Timoshenko and Woinowsky-Krieger, 1959). A number of assumptions underlying this approach justify calling the models 'simplified'. Simplified models may be applied if the results have to be obtained within a limited time frame. In turn, the advanced non-linear model was developed using finite element approach and implemented in the Abaqus software. The advanced model focuses mainly on detailed modelling of mechanical properties of a valve system to properly evaluate stress. In addition, this model takes into account contributions of components supporting the disc stack and produces correct results even under complex load distributions. A dedicated tool, called the bending tool, was developed and utilised to experimentally validate the advanced model. Experimental validation supported by advanced statistical post-processing proved the prediction to have accuracy higher than 90 %.


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    Titel :

    Static validation of a model of a disc valve system used in shock absorbers


    Beteiligte:
    Czop, Piotr (Autor:in) / Slawik, Damian (Autor:in) / Sliwa, Pawel (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2010


    Format / Umfang :

    26 Seiten, 18 Bilder, 10 Tabellen, 19 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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