| The C/SiC lattice composite materials are excellent insulation materials withlow density, strong oxidation resistance and good mechanical properties.Lattice composite is a lightweight multifunctional material emerging in recentyears. Introducing the concept of lattice of C/SiC composites in the design andpreparation, proposing the new concept of ceramic lattice composite materialswould greatly reduce quality of thermal protection structure, improve theefficiency of it. In this paper, the sandwich structure of ceramic lattice compositematerials are designed with different configuration,the thermodynamic properitesof ceramic lattice composite materials is compared with different configurationby the ANSYS.Firstly, the temperature field and stress field of single-layer were analyzedby the ANSYS. The variation of Von Mises stress and the insulation properties ofthe lattice structure with truss inclination angles and diameter were analyzed. Themechanism of heat conduction was also studied. The results indicated that theheat conduction of lattice structure is mainly relied on the truss and the insulationproperty of single-layer lattice structure is worse with increasing truss inclinationangles and diameter. The Von Mises stress is smaller with increasing trussinclination angles.Secondly, the temperature field and stress field of double-layer wereanalyzed by the ANSYS. The results indicated that the insulation properties ofdouble-layer lattice structure is worse with increasing truss inclination angles anddiameter. The Von Mises stress is smaller with increasing truss inclination angles. Finally, The temperature field of lattice structure filled and unfilled withinsulation blanket was compared. The results indicated that filled with theinsulation blanket can remarkably decrease the temperature of the bottomfacesheet of the lattice composites and have a great improvement on theinsulation performance of lattice composites. |
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