Non-linear FEA models are applied to three different catalytic converters, with the objective of predicting structural parameters such as shell deformation, push-out force, and mounting-system contact pressure under various conditions. The FEA modeling technique uses a novel constitutive model of the intumescent mat material typically found in ceramic-monolith converter designs. The mat constitutive model accounts for reversible and irreversible thermal expansion, allowing for the prediction of the one-way converter deflection observed in hot durability tests. In addition to this mat material model, the FEA methodology accounts for elastic and plastic shell deformation, contact between materials, and a three-dimensional temperature field in the shell and mat. For each of three designs, predictions are presented for converter canning, heat-up, and cool-down (i.e., post-heating) conditions. Measured push-out force and shell deflections are presented alongside the FEA predictions, with good agreement between experimental and computed trends.


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    Title :

    FEA Simulation and Experimental Validation of Catalytic Converter Structural Integrity


    Additional title:

    Sae Technical Papers


    Contributors:
    Lee, J. K. (author) / Kim, Jaesu (author) / Fuehne, Joe (author) / Lyon, Richard (author) / Taylor, William (author)

    Conference:

    SAE 2000 World Congress ; 2000



    Publication date :

    2000-03-06




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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