导电压头作用下的功能梯度压电涂层二维黏附接触问题研究OA北大核心CSTPCD

Nano-indentation experiments are an important means of studying the mechanical properties and sur-face morphology of materials.With the decrease of the contact area,the adhesion between the indenter and the contact surface of the specimen cannot be ignored.Therefore,the adhesion effect plays an important role in the contact problem under the action of the indenter.The functional graded piezoelectric material(FGPM)has the advantages of both graded and piezoelectric materials,and can effectively avoid contact damage and failure of coatings.The adhesive contact problem of FGPMs under conducting indenters was studied.With exponentially changing material parameters of the FGPM coating,based on the Maugis adhesive model,the control singular integral equation for the 2D frictionless adhesive contact problem of the FGPM coating under the conducting in-denter,was obtained through the Fourier integral transform,and the Erdogan-Gupta numerical method was used to solve the equation.The effects of the adhesive stress,the graded parameter and the charge of the inden-ter on the electro-mechanical coupling response were obtained.The results provide a theoretical basis for im-proving the contact behavior of material surfaces with FGPM coatings,and help design piezoelectric structures and devices.