某飞行器防热材料力学性能测试与分析

按照飞行过程中的防热层温度变化情况,对某飞行器防热材料进行了不同温度下的弯曲性能测试。测试结果表明,该防热材料在升温和降温过程中,在相同温度点具有明显不同的力学性能。根据材料性能测试结果,用有限元方法进行模拟,进一步得出该材料的弯曲模量与拉伸模量的关系,为防热结构进行有限元分析提供材料性能数据支撑。

Test and Analysis of Mechanical Properties of Aircraft Thermal-Protection Paterial

To study the mechanical properties of a new material with the change in temperature during the flight, a bending test is conducted in different temperatures. The result of the test indicates that in the same temperature, the mechanical properties of the material in the temperature rising period is apparently different compared with it in the cooling down period. According to test result, the relation between tensile modulus and bending modulus of the material is gained by the FEM analysis and the data is used for the FEM analysis of the new thermal-protection structure.