SiC复合包壳热-力学行为计算理论分析

Computational Methodology of Thermal-Mechanical Performance of SiC Composite Cladding

针对SiC复合包壳特有的高强度、高弹性模量和脆性特征及其结构上的完整性和连续性,采用弹塑性理论和固体传热理论分析了SiC复合包壳热-力学行为计算理论及其求解方法。通过分析三维有限元计算节点的连续性,采用三维有限元软件完成了SiC复合包壳热-力学行为的模拟计算,并与国外公开文献报道进行对比。结果表明,有限元计算方法适用于SiC复合包壳热-力学行为的模拟分析;弹塑性理论和固体传热理论分析表明SiC复合包壳温度场和应力场可解;三维有限元计算结果与文献结果符合较好,证明了计算结果的准确性。

In view of the high strength,elastic model and brittleness of SiC composite cladding,the thermo-mechanical computational theory and calculation method of SiC cladding was analyzed according to the elastic-plastic theory and solid heat transfer theory in this paper.The continuity of computational net in the three dimensional finite software was evaluated and the thermo-mechanical performance of SiC cladding was simulated by using the three dimensional finite software.The calculation result was compared with that from the literature.The analysis and calculation result indicated that three dimensional finite can be used to calculate the thermal-mechanical performance of multilayer SiC cladding due to the computational continuity.The stress and temperature field of SiC cladding was solvable according to the elastic-plastic theory and solid heat transfer theory.The calculation result was in good agreement with literature and the correctness was proved.