梯度复合材料热应力有限元分析  

Finite Element Analysis of Thermal Stress for Gradient Composite

作　　者：范世通[1] 汤海波[1] 张述泉[1] 王华明[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院大型整体金属构件激光直接制造教育部工程研究中心,北京100191

出　　处：《热加工工艺》2012年第4期106-109,共4页Hot Working Technology

基　　金：国家重点基础研究发展计划(973计划)(2010CB731705)

摘　　要：建立了11个由不同长径比(1～30)单向增强相增强梯度复合材料物理模型,采用ANSYS有限元分析方法研究了增强相形态对梯度复合材料最大热应力的影响及热应力的分布。结果表明,增强相形态对梯度复合材料的热应力有重要影响,最大热应力值随增强相长径比的减小而减小。当长径比小于9时,最大热应力显著降低,且热应力主要分布在中间梯度层。Eleven gradient composite models reinforced by unidirectional reinforcement with different aspect ratio ranged from 1 to 30 were established,and the maximum thermal stress as functions of the aspect ratio of the reinforcement,as well as the thermal stress distributions were simulated using ANSYS finite element method.The results show that,the thermal stress of gradient composite is greatly affected by the reinforcement shape.The maximum thermal stress decreases with the decrease of aspect ratio,and decreases significantly when the aspect ratio is below 9.The thermal stress mainly spreads in graded layers.

关 键 词：梯度复合材料 热应力 长径比 有限元 

分 类 号：TB33[一般工业技术—材料科学与工程]