Woven thermal protection systems (TPSs) are being developed for extreme heating conditions experienced during hypersonic atmospheric entry. A linear elasticity solver is used to model this new class of TPS. In particular, this paper explores and assesses the effectiveness of the linear elastic model for the Heatshield for Extreme Entry Environment Technology (HEEET) woven material through comparisons with experimental data measured on a 24 in. HEEET weave. Initial assessments are performed using a known set of stiffness properties previously derived from a 13 in. HEEET weave. Comparisons between simulation results and experimental strain gauge measurements show excellent agreement on the insulation surface but a considerable overprediction of the deformation on the recession surface. The manufacturing process for the 24 in. weave is postulated to have resulted in a stiffer recession layer weave. To account for this, inverse optimization is used to infer stiffness properties of this tighter weave with no a priori properties. The results indicate that the 24 in. weave is approximately twice as stiff as that of the 13 in. weave, and comparisons between simulation displacement predictions using the inferred properties and experimental linear variable displacement transducer measurements show excellent agreement.


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    Titel :

    Structural Response Modeling of a Woven Thermal Protection System


    Beteiligte:
    Dang, David Z. (Autor:in) / Stern, Eric C. (Autor:in) / Boyd, Iain D. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2020-08-31


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch