Modelling the composite unit cell for predicting thermal transport

Johar K. Farooqi, M. A. Sheikh

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Modelling and analyzing a representative Unit Cell has been shown in the present study as a successful technique for predicting thermal transport behaviour for composites such as Ceramic Matrix Composites (CMCs). In contrast to employing costly experimental infrastructure for such sophisticated materials that have very complex and meticulous manufacturing routes, the option of Finite Element modelling at the mesoscopic level has been suggested as very much effective. An advanced FE-based commercial code has been employed here which enables detailed examination of some possible designs for the CMCs predominantly focusing on the geometric but also on material details. The variation of material constituents can be incorporated in this Unit Cell model with subtle manipulation of key parameters dictated by quantitative SEM morphological data. Experimental data for thermal transport properties for different CMCs had been collected previously which has been used here for validation. Two CMC materials employed in the present study are plain and 8-harness satin woven laminate specimens used for high temperature application. Material-A has been analyzed with a focus on the homogenization of microscopic constituent material properties into the macroscopic thermal transport behaviour. Actual set of property data used in material-A Unit Cell has been calculated after cumulative property degradation results have been extracted from unique sub-models of three individual types of observed porosities. A good agreement with the experimental data has been presented setting the stage for establishing the validity of this modelling exercise as more generic and this is done in the second phase which involves its use in a much more complex material. Finally, a Representative Volumetric Element (RVE) of a structurally intricate material-B has been modelled to predict its macroscopic thermal transport behaviour. The mathematical challenges faced during this modelling exercise have also been met with the appropriate computational hardware platform coupled with the FE-based software. Copyright © 2006 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
    Original languageEnglish
    Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference|Collect Tech Pap AIAA ASME ASCE AHS Struct Struct Dyn Mater
    Pages7184-7195
    Number of pages11
    Volume10
    Publication statusPublished - 2006
    Event47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference - Newport, RI
    Duration: 1 Jul 2006 → …

    Conference

    Conference47th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
    CityNewport, RI
    Period1/07/06 → …

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