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涂层特性与厚度对涂层/基体结合强度的影响得到了广泛研究,然而涂层层数对涂层构件结构强度影响的规律却鲜有报道.应用有限元分析方法,探索了接触载荷条件下,多层硬脆涂层构件的应力分布基本规律.提出以最大剪切应力作为涂层构件结合强度的评价标准.通过比较有限元与赫兹接触精确解析解验证了模型的可靠性.讨论了涂层层数对涂层/基体界面最大剪切应力影响的关系.结果表明:随涂层层数的增加,涂层/基体的界面突变应力沿z轴向涂层表面靠近;而x方向的最大剪切应力随涂层层数的增加变化幅度趋于平缓.
However, the influence of the number of coating layers on the structural strength of the coating has rarely been reported.Using the finite element method, the effects of the coating thickness and the thickness on the bonding strength of the coating / , The basic law of stress distribution of multi-layer hard and brittle coating components is proposed.The maximum shear stress is taken as the evaluation criterion for the bonding strength of the coating components.The reliability of the model is verified by comparing the exact analytic solution of finite element and Hertz contact The results show that the interface abrupt stress of the coating / substrate approaches along the surface of the z-axis coating as the number of layers increases, while the maximum of x-direction The change of shear stress tends to be gentle with the increase of coating layers.