C/SiC复合材料液相渗透连接应力的数值模拟与验证  

Numerical Simulation and Verification of Liquid Phase Infiltration Joint Stress in C/SiC Composite

作　　者：汪清[1] 成来飞[1] 张立同[1] 徐永东[1] 

机构地区：[1]西北工业大学超高温结构复合材料国防科技重点实验室

出　　处：《航空制造技术》2007年第6期73-76,共4页Aeronautical Manufacturing Technology

基　　金：国家"十五"预研项目;国家自然科学基金项目(50272053)。

摘　　要：采用有限元和试验两种方法研究了复合材料孔隙率对在线液相渗透连接接头残余应力的影响。利用ANSYS有限元分析软件,建立了计算2D及3D￣C/SiC复合材料连接接头残余应力的有限元几何、物理模型,分析了复合材料中孔隙率对连接接头残余应力的影响。同时,通过试验测试了不同孔隙率对连接强度的影响,其试验结果与计算结果一致,证明了所提出的计算方法的正确性。FEM and test are used to study the effect of porosities in composite on residual stress in the on-line liquid phase infiltration joint. The geometrical and physical FE model is created for calculating residual stress of 2D and 3D-C/SiC composite joint by using ANSYS FE analysis soft-ware and the effect of porosity in composite on the resi-dual stress in the joint is analyzed. The effects of differ-ent porosities on joint strengths are detected through tests. The test results are consistent with the calculated results, and this shows the validity of the calculation method presented.

关 键 词：C/SIC复合材料 液相渗透连接 有限元法 孔隙率 

分 类 号：V257[一般工业技术—材料科学与工程]