Method for determining normal contact stiffness of fixed joint surface

A technology of fixing the joint surface and contact stiffness, applied in the direction of material resistance, etc., can solve the problems of not considering the spatial distribution of three-dimensional roughness peaks, the high cost of the contact stiffness measurement test bench, and the high requirements of the deformation measurement sensor, so as to achieve convenient and fast testing and high precision. , Overcome the effects that are not easy to measure
CN102608167BInactive Publication Date: 2014-07-02XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2014-07-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a new method for indirectly obtaining normal contact stiffness of joint surface according to theoretical calculation and experimental test under the condition that the contact resistance ratio of the fixed joint surface is measured more easily than the normal contact stiffness. Relationship between joint surface contact resistance RC and normal contact stiffness Ktot is established by measurement and aftertreatment for micro appearance of contact surface. Firstly, an expression of the joint surface contact resistance RC is established; then the expression of normal contact stiffness Ktot is established; at the last, the relationship between the joint surface contact resistance RC and the normal contact stiffness Ktot is established. According to the invention, the method overcomes the defect that the normal contact stiffness is measured difficultly; the method considers elasto-plastic contact of two coarse surfaces, and further considers the more comprehensive, accurate actual surface appearance information.
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Description

technical field

[0001] The invention relates to a method for determining the normal contact stiffness of a fixed joint surface, in particular to a method for inverting the contact stiffness by testing the contact resistance based on the microscopic topography of two contact surfaces of the joint surface. Background technique

[0002] There is a close relationship between the characteristics of the joint surface and the static and dynamic characteristics of the mechanical structure, as well as vibration and vibration control. Since the 1960s, scholars from various countries have studied the problems of the joint surface from the macro to the micro, from the phenomenon to the essence. A lot of research has been carried out. Due to the many factors affecting the characteristic parameters of the binding surface, its mechanism of action is complex and has strong nonlinear characteristics, and the nature of the mechanism of the binding surface has not yet been fully understood and...

Claims

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