摘要
采用细观力学的分析方法, 从蜂窝夹芯复合材料板中选取代表性的细观胞元, 应用周期性条件、三维有限元方法分析了细观胞元的温度场和应力场, 计算得到宏观热学与力学参数, 还考虑了蜂窝芯内部的辐射换热, 讨论了蜂窝芯对夹芯板宏观导热系数、刚度及热膨胀系数的影响。结果表明: 沿厚度方向导热系数与传统算法比较有较大差异, 刚度参数除D12外都可以由传统公式近似, 而计算热膨胀系数时不能忽略芯层热膨胀的影响。
The micro-analysis of a typical and periodical cell selected from the panel was used to calculate the macro-parameters of the sandwich panels. The temperature and stress fields were analyzed by a three-dimensional finite element method and the thermo-mechanical parameters of sandwich panels were given considering heat transfer by radiation inner the honeycomb core. The influence of the honeycomb core on heat conductivities, thermal expansion coefficients, elasticity properties and bending stiffness of sandwich panels was also investigated. The results show that the heat conductivity along the thickness was different from that obtained by traditional methods, all mechanical properties except D12 could use conventional results to approximate and the effect of the honeycomb core on thermal expansion could not be neglected.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第2期130-136,共7页
Acta Materiae Compositae Sinica
基金
高等学校全国优秀博士论文作者专项基金项目(200242)
关键词
蜂窝夹芯板
细观胞元
热学与力学参数
有限元法
内部辐射
Aircraft materials
Finite element method
Heat transfer
Honeycomb structures
Mechanical properties
Sandwich structures
Stress analysis
Structural panels
Three dimensional
