TiN涂层/基体接触应力的有限元分析  

Finite element analysis of the contact stress of TiN coating/substrate

作　　者：陈东[1] 谢华[1] 陈小文[1] 

机构地区：[1]福州大学机械工程学院,福建福州350108

出　　处：《材料研究与应用》2010年第3期192-198,共7页Materials Research and Application

摘　　要：利用ABAQUS软件对在柱压头作用下TiN涂层/基体系统的应力进行有限元分析.通过有限元解与经典Hertz理论解的对比,验证了模型的可信度.分析了涂层厚度、涂层与基体的弹性模量比以及摩擦系数等参数对涂层/基体系统应力分布的影响.分析结果表明:在法向静载作用下,随着涂层厚度的增加或涂层/基体弹性模量比(Ec/Es)的减小,接触表面处和界面处的最大应力均减小.在切向滑动过程中,随着摩擦系数的增大,表面处和界面处的最大应力均增大.沿z轴的Mises应力在界面处的突变与Ec/Es、涂层厚度以及摩擦系数有着密切的关系.分析的结果有助于理解涂层/基体系统的失效机理,可为涂层的设计提供理论指导.ABAQUS was applied to analyse the stress of the TiN coating/substrate system with a normal load applied to cylinder indenter.The results of finite element method（FEM） and the solution of classical Hertz theoretical method were compared to prove the accuracy of FEM model.The stress in the coating substrate system has been calculated based on different thickness of coating,coating-to-substrate Young＇s modulus ratio and the friction coefficient.It was found when the normal stastic load was applied on the indenter,the maximum stress at the contact surface and the interface decreased with the coating thickness increasing or the coating-to-substrate Young＇s modulus ratio decreasing;if the indenter tangential side slipped on the coating surface,the maximum stress at the contact surface and the interface increased with the friction coefficient increasing.The gradient of Von Mises stress along the z axis strongly depended on the factors mentioned above.Analysis results are helpful to understand the failure mecheanism of the coating/substrate system well,and also can provide theoretical guidance for the coating design.

关 键 词：TIN涂层 HERTZ接触 有限元 应力分析 

分 类 号：TG174.4[金属学及工艺—金属表面处理]