Al2OTi系梯度功能材料残余热应力有限元分析-材料工程.PDFVIP

Al O -Ti 2 3 - Al2O3 Ti Finite Element Analysis of Thermal Residual Stresses in Al2 O3-Ti System Functionally Gradient Material ( ) Li henxi hang Tongjun Li Xingguo ( Central China U niversity of Science ang Technology) [ ] ( , ) - ( ) Finite Element Method FEM Al2 O3 T i FGM , ( NFGM ) : [ Abstract ] The elastic finite element method was introduced to study thermal residual 2 3 - ( ) . stresses developed during fabrication in Al O T i system functionally gradient material FGM T he effect of graded interlayer number, graded thickness and compositional gradient exponent on thermal residual stresses value and distribution was analyzed then several parameters were opti-, mized. T hermal residual stresses in non-gradient material ( NFGM ) and optimized FGM were comprised the result showed that the effect of thermal stresses alleviated by FGM was remark-, able. Keywords functionally gradient materialthermal residual stress finite element method 1 2 - ( FGM ) 2. 1 FEM , 1 t FGM , / = 0.27, H D FGM , , [13] ( Finit e Element Method) Al2 O3 -Ti , , Al O -T i 2 3 , ( NFGM )