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Methodology for Validation of Material Response Models Using In-Situ Ablation Sensing Methods


Title: Methodology for Validation of Material Response Models Using In-Situ Ablation Sensing Methods

Authors: Colin Yee, Jon Langston, Hao Wu and Joseph H. Koo

DOI: 10.33599/nasampe/s.20.0035

Abstract: A complete and efficient methodology for characterizing the pyrolysis response of ablative Thermal Protection Systems (TPS) materials is developed. The end goal of acquiring the inputs necessary for material response (MR) modeling in extreme hyperthermal environments is to permit rapid down-selection of TPS materials. The example case in this study focuses on the characterization of the MXB-360 glass/phenolic ablative for use in the Insulation Thermal Response and Ablation Code (ITRAC) developed by Northrop Grumman Innovation Systems. Aerothermal ablation testing was conducted on an oxyacetylene test bed with the use of small test models. Emphasis is placed on determining pyrolysis kinetic modeling constants by use of TGA, pyrolysis gas composition and enthalpy tables by energy dispersive x-ray (EDX) spectroscopy, and in-depth temperature profile matching by in-situ ablation sensing methods. Sensor construction methods, oxidizing versus non-oxidizing environment considerations, data analysis of in-situ ablation sensing methods, and validation criteria for MR modeling are briefly discussed.

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Conference: SAMPE 2020 | Virtual Series

Publication Date: 2020/06/01

SKU: TP20-0000000035

Pages: 15

Price: FREE

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