一种二维梯度电极模型的表面热应力缓和设计

材料科学与工程学报, 2003, 21(5): 697-702. doi: 10.3969/j.issn.1673-2812.2003.05.019

一种二维梯度电极模型的表面热应力缓和设计

张晓泳 ^1, , 周科朝 ^2, , 李志友 ^3, , 张雷 ^4,

1.中南大学粉末冶金国家重点实验室,湖南,长沙,410083

2.中南大学粉末冶金国家重点实验室,湖南,长沙,410083

3.中南大学粉末冶金国家重点实验室,湖南,长沙,410083

4.中南大学粉末冶金国家重点实验室,湖南,长沙,410083

基金项目: 国家重点基础研究发展计划(973计划)(G1999064903)

关键词：功能梯度材料 , 热应力 , NiFe2O4 , 金属陶瓷 , 惰性阳极

Design for the Relax of Thermal Stress in the Surface of 2-D Functionally Graded Model

针对一种侧面和一端的成分呈梯度变化的圆柱体电极模型进行了热应力缓和优化设计.模型材料成分是金属Cu和NiFe2O4尖晶石陶瓷.采用混合律定律确定材料组分-性质关系,利用ansys有限元分析软件计算了从300K(零应力状态)升温到1300K时模型表面的热应力,分析了层数n、成分指数p以及锥角θ对模型表面热应力分布的影响.结果表明:层数n主要影响应力曲线的光滑程度,层数增加,曲线变得平滑;成分指数p是热应力缓和设计的关键,指数越小,应力越小;锥角θ的增加也可缓和热应力,但作用不如成分指数.

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一种二维梯度电极模型的表面热应力缓和设计

Design for the Relax of Thermal Stress in the Surface of 2-D Functionally Graded Model

参考文献