HIGH-TEMPERATURE FAILURE OF RUBBER-LIKE HEAT-SHIELDING MATERIALS UNDER CONDITIONS OF HIGH-PRESSURE

Results are given of experimental studies into basic regularities of h igh-temperature failure of a rubberlike heat-shielding material at hig h pressure. Comparison is made of the experimental and theoretical res ults for the model of thermochemical destruction of heat-shielding mat erial, leading to the conclusion that, under conditions of high pressu re, the carryover of mass of heat-shielding material occurs mainly as a result of thermomechanical destruction under the effect of tangentia l friction stresses of gas flow flowing in parallel with the surface b eing heated. A physical model is proposed of the process of high-tempe rature failure of heat-shielding material under conditions of high pre ssures.