基于ansys的硬质涂层界面应力场研究与试验分析word格式论文.docxVIP

基于 ANSYS 的硬质涂层界面应力场分析与试验研究 优秀毕业论文  PAGE 2 精品参考文献资料 本文研究的主要内容和目标是针对球形压头和柱形压头作用下多种单层硬质涂层和多 层硬质涂层的表面和膜基结合面上的接触应力，基于大型有限元软件 ANSYS 建立接触模型 进行有限元分析，详细探讨不同弹性模量比、泊松比、摩擦系数 μ 及厚度比等参数对涂层基 体接触应力场分布的影响，为硬质涂层的正确优化设计提供理论指导。 为了给仿真模拟计算提供依据，对 DLC、TiAlN、TiN、CrN 薄膜进行了结合力测量实 验和摩擦磨损实验，随着涂层的弹性模量的增大，膜基结合力也随之增大；在涂层表面与压 头接触时，各自涂层的稳态摩擦力大小是 CrNTiNDLCTiAlN，这为之后的仿真模拟计算 提供了有力依据。 对单层涂层结合强度测试模型进行有限元设计及分析，得到在柱压头和球压头作用下弹 性??量、泊松比、摩擦系数对涂层结构表面和膜基接触面上切应力和压应力的影响趋势；并 将模拟计算结果与实验所得数据进行了对比，验证了其可信性。 对双层涂层结合强度测试模型进行有限元设计及分析，得到在球压头作用下不同厚度比 和不同表面涂层对双层涂层结构表面和膜基接触面上切应力和压应力的影响趋势。 论文的最后对本文工作进行了总结，并提出了需要继续深入研究的一些问题，对本领域 的工作进行了展望。 关键词：有限元分析，应力场，摩擦磨损，硬质涂层，ANSYS，球柱压头。 ABSTRACT The superficial stress of the hard coatings and the interfacial stress between substrates and coatings were studied in this paper. The single and multilayer hard coatings were studied under the actions of the spherical indenter and cylinder indenter respectively, and the contact model for finite element analysis was established based on the finite element software ANSYS. The influence of different parameters such as elastic modulus ratio , Poissons ratio, friction coefficient μ and the thickness ratio of coating on the distribution of the contact stress are discussed. The result of this work will provide theoretical guidance for the correct optimization design. In order to provide a basis for the simulation calculation, DLC, TiAlN, TiN and CrN films were chosen for the bonding force measurement experiment and friction and wear experiment. The film adhesion gets higher with the elastic modulus of coatings increasing. When the head contact with the coating surface, the quantity size order of steady friction on each coating is CrN DLC TiN TiAlN, this result provides a strong basis for the calculation later. The bonding strength test model of single layer coating was designed and then the finite element analysis was calculated, at last the variation trends of shear stress and pressure stress which were on the coating surface and the surface that