Thermal Resistance Analysis of Flexible Composites Based on Al2O3 Aerogels
The deployable descent technology is a lightweight entry method using an inflatable heat shield. The heatshield consists of a pressurized core which is covered by different layers of thermal insulation and flexible ablative materials in order to protect against the thermal loads. In this paper, both aluminum and silicon-aluminum aerogels were prepared by freeze-drying method. The latter material has bigger specific surface area and nano-scale pores. Mullite fibers are used as the reinforcing fibers to prepare the aerogel matrix to improve composite flexibility. The flexible composite materials were performed as an insulation layer to an underlying aramid fabric by a thermal shock test at a heat flux density of 120 kW/m2 and uniaxial tensile test. These results show that the aramid fabric with untreated mullite fibers as the thermal protective layer is completely carbonized at the heat of about 60 s. The aramid fabric as a thermal resistance layer of the composite material still has good mechanical properties at the same heat condition.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1474996Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 690
 E. H. Richardson, M. M. Munk, B. F. James, “Review of NASA in-space propulsion technology program inflatable decelerator investments,” 18th AIAA Aerodynamic Decelerator Systems Technology Conference, Munich, Germany, May 2005.
 A. M. Korzun, G. F. Dubos, C. k. Iwata, “A concept for the entry, descent and landing of high-mass Payloads at Mars”. Acta Astronautica, vol.66, pp. 1146-1159, 2010.
 Z. Shen. “Inflatable Re-entry Shield of Payload Recovery Technology,” Spacecraft Recovery ＆ Remote Sensing, no. 2: pp.1-6, 2001.
 F. Sabri, A. A. Lakis, “Hybrid finite element method applied to supersonic flutter of an empty or partially liquid-filled truncated conical shell,” Journal of Sound and Vibration, vol.329, no.3, pp. 302-316, 2010.
 G. Xia, W. Cheng, Z. Qin, “Development of Flexible Thermal Protection for System Inflatable Re-entry Vehicles,” Aerospace Materials Technology, no.6, pp.1-6, 2003.
 R. O. Foelsche, A. A Betti, R. S. M. Chue, et al. “Supersonic decelerators for freeflight atmospheric flight testing,” 17th AIAA International Space Planes and Hypersonic Systems and Technologies Conference. San Francisco, California, pp. AIAA-2011-2292, 2011.
 A. L. Hutchings, R. D. Braun, K. Masuyama, et al. “Experimental determination of material properties for inflatable aeroshell structures,” 20th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar. Seattle, Washington, pp. 4-7, 2008.
 A. W. Turner, J. P. Kabche, M. L. Peterson, et al. “Tension/torsion testing of inflatable fabric tubes,” Experimental Techniques, vol. 32, no.2, pp. 47-52, 2008.
 J. C. Boulware, D. Andrews, B. Bloudek, “Thermally protecting a reentry ballute with transient porosity,” AIAA Space 2007 Conference ＆ Exposition, Long Beach, California, pp.18-20, September 2007.
 M. Schüßler, M. Auweter-Kurtz, G. Herdrich, et al. “Surface characterization of metallic and ceramic TPS-materials for reusable spacevehicles,” Acta Astronautica. vol. 65, pp. 676-686, 2009.
 X. Xiao, X. Liu, G. Cao, et al. “Atomic layer deposition TIO2/AL2O3 nanolayer of dyed polyamide/aramid blend fabric for high intensity UV light protection,” Polymer Engineering & Science. vol. 55, pp. 1296-1302, 2015.
 S. Brzezinski, D. Kowalczyk, B. Borak, “Applying the sol-gel method to the deposition of nanocoats on textiles to improve their abrasion resistance,” J. of Applied Polymer Science. vol. 125, pp. 3058-3067, 2012.
 J. wei, X. Hou, H. Tan, Y. Liu, “Heat resistance investigation and mechanical properties of fabric coated with Al2O3 sol–gel, ” The Journal of The Textile Institute, vol.109, no.1, pp.8-16, 2018.
 A. Aboshio, S. Green, J. Ye “Experimental investigation of the mechanical properties of neoprene coated nylon woven reinforced composites,” Composite Structures. vol. 120, pp. 386-393, 2015.
 F. I. Hurwitz, M. Gallagher, T, C. Olin, M, K. Shave, et al. “Optimization of Alumina and Aluminosilicate Aerogel Structure for High-Temperature Performance,” International J. of Applied Glass Science. no.5, pp. 276-286, 2014.
 K. Abid, S. Dhouib, F. Sakli, “Addition effect of nanoparticles on the mechanical properties of coated fabric,” The Journal of The Textile Institute, vol. 101, no.5, pp. 443-451, 2010.