摘要
金属陶瓷硬质覆层材料是一种具有高耐磨损性能的新型层状复合材料,尤其适应于耐磨损零件的制造。文中选择板类金属陶瓷硬质覆层零件为研究对象,首先把该零件等效为均质零件,把该均质零件与圆柱体零件在一定压力作用下的摩擦过程简化为平面应变问题,根据赫兹接触理论建立覆层零件界面处最大剪切应力理论模型。根据理论模型进行实例研究,并进行有限元分析。理论研究结果与有限元分析结果相符。二者均表明,覆层零件界面处最大剪切应力随覆层厚度的增大而减小,随磨损载荷的增大而增大。同时研究摩擦副材料对覆层零件界面最大剪切应力的影响规律。提出覆层零件在磨损载荷作用下应满足其界面最大剪切应力不超出相应覆层材料的界面剪切强度的设计准则。文中的研究结果对金属陶瓷硬质覆层零件的设计、优化以及金属陶瓷硬质覆层材料的进一步推广应用具有重要的理论指导意义。
Cermet cladding material is a new kind of composite material with high wear resistance, it is especially suitable to manufacture parts under wear condition. A plate cermet cladding part is selected as the study object. It is equaled as a uniform part at first. The friction process of the equivalent part and a cylindrical part under a certain press load is simplified as a plane strain problem. Based on Hertz theory, the theoretical model of the maximum interface shear stress in the cladding part is established. Example and finite element analyses（FEA） are carried out. Theoretical results well coincides with those of FEA. Both results show that, the maximum interface shear stress of the cladding part decreases with the increase of the cladding thickness; it increases with the increase of the wear load. The influence of the materials of the friction pair on the maximum interface shear stress in the cladding part is also studied. The design principle that the maximum imerface shear stress cannot exceed the interface shear strength of the corresponding cladding material is proposed. Results have theoretical significance to the design and optimization of cladding parts and to more applications of the cermet cladding material.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2008年第3期428-432,共5页
Journal of Mechanical Strength
基金
国家自然科学基金(59975054)
山东科技大学科学发展基金(05g012)资助项目~~
