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In the aerospace domain, the environment which the flight vehicle structure locates and bad, like the missile end forehead, the solid propellant engine nozzle throat lining and so on all works in the superhigh temperature environment.Uses in these spots when material work, causes own quality loss through the ablation, absorbs and carries off the massive quantity of heats, the impediment quantity of heat transmission.According to the hot shielding material thermochemistry ablation mechanism establishment reasonable mathematics aerodynamics model, the analysis volume ablation causes the material performance along with the temperature change rule is extremely important.
Through guards against heat the material interior thermochemistry ablation mechanism analysis to the high temperature environment under, studied the component material ablation using the Eshelby equivalent mixture method - to change the characteristic and the high temperature mechanics performance and the hot physical performance change rule.After the supposition material thermo-chemical reaction the thermal decomposition production the medium statistics uniform distribution, had considered the ablative response produces between the blowhole and the solid phase medium mutual function, forecast the substrate, the enhancement textile fiber, the unidirectional textile fiber strengthened the compound materials the viewing carefully structure and between the macroscopic mechanics hot physics performance change relations, and has carried on the value simulation.The findings indicated that,The unidirectional compound materials longitudinal young's modulus weakens along with the temperature increment, and concerns with the warming speed.The model hot shielding material high temperature performance theory forecast and the empirical datum carry on the comparison, finally tallies well, explained the theoretical model is correct, has laid the foundation for the heatproof compound materials hot structure analysis.
Key word: Guards against heat the compound materials; Mesomechanics; Volume ablation; High temperature performance