摘要
Al2O3陶瓷/不锈钢连接结构因其兼具陶瓷和金属的性能优势,在结构工程领域得到了广泛的应用,但由于陶瓷、不锈钢及其连接材料的热物理性质不匹配,在零件存储、使用过程中,环境温度变化会导致连接处产生较大的热应力和热变形,削弱各层材料间的连接性能。基于大型通用有限元计算软件ANSYS,针对某Al2O3陶瓷/不锈钢/Kovar合金连接结构,建立了有限元分析模型,分析得出了变温载荷下该结构整体及联接处的应力应变规律,并在此基础上对该结构进行优化。
The Al2O3 ceramic/stainless steel structure has been widely applied in the field of structural engineering because of its performance advantages of both ceramic and metal. But the change of the ambient temperature will cause considerable thermal stress and deformation at the connection location, and weaken the join performance between the layers of material in the storage or use process, which result fi-om the tmmatch of thermophysical properties of Ceramic, stainless steel, and its connection material. This paper establishs a finite element analysis model for a Al2O3ceramic / stainless steel/Kovar alloy structure based on large-scale general-purpose finite element calculation software ANSYS, the stress-strain law of overall structure and the connection location by variable temperature load is got by calculating. And also optimizes the structure on this basis.
出处
《机械》
2013年第6期30-34,共5页
Machinery
关键词
变温载荷
热应力
热变形
结构优化
variable temperature load
thermal stress
thermal distortion
structure optimum
