Thermal deformation of a polymer heat-shielding material on the trajectory of descent
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The thermal deformation of a heat-shielding coating of polymer composite material with a phenol-formaldehyde matrix under conditions simulating the temperature-time interval of descent of a spacecraft from orbit is considered. It is shown that in the plane of reinforcing of the composite the maximum thermal deformations occur in a direction 45° to the base of the fabric of the filler and with an increase in heating rate there is a significant reduction in the amplitude of its dilatometric values. The residual relative thermal deformation of the heat-shielding material tested to a program of descent from a trajectory may reach 2% and more.
KeywordsPolymer Heating Rate Composite Material Thermal Deformation Polymer Composite Material
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- 1.G. N. Tret'yachenko, L. I. Gracheva, and B. V. Marasin, “A dilatometer for investigation of thermal deformation of breaking-down composite materials,” Metrologiya, No. 9, 43–46 (1986).Google Scholar
- 2.B. V. Marasin, V. V. Sinchuk, A. G. Malyi, and L. I. Gracheva, Inventors' Cert. 998858 USSR, IPC4 G 01 B 11/16. A photoelectric servosystem for measurement of deformations of an object, Otkryt. Izobret., No. 7, 226 (1983).Google Scholar
- 3.B. V. Marasin, L. I. Gracheva, A. N. Fot, and V. V. Ruban, “Automated measurements of the thermal coefficients of linear expansion of composite polymer materials,” Izmer. Tekh., No. 10, 30–32 (1986).Google Scholar
- 4.Yu. V. Polezhaev and F. B. Yurevich, Thermal Protection [in Russian], Énergiya, Moscow (1976).Google Scholar
- 5.L. I. Gracheva, G. N. Tret'yachenko, V. V. Ruban, et al., “A method of investigation of the thermal coefficient of linear expansion of glass-reinforced plastics in a broad temperature and heating rate range,” Thermophysical Properties of Substances, Proceedings of the Eighth All-Union Conference on Thermophysical Properties of Substances [in Russian], Part II, Novosibirsk (1989), pp. 234–240.Google Scholar