Mechanism kinematic pair wear simulation method based on mesh deformation technology

Abstract

The invention relates to a mechanism kinematic pair wear simulation method based on the mesh deformation technology. The method includes the following steps that a mechanism kinematic pair model is created, a contact region of the mechanism kinematic pair model is judged to be recorded as a target region, mesh generation is conducted on the target region, and the serial number and initial coordinate of a grid node are output; a massless small ball model is created at the grid node, the small ball model takes the place of the target region to make contact with the mechanism kinematic pair model, dynamical simulation is conducted, and the interaction force and relative sliding velocity between the small ball model and the mechanism kinematic pair model are obtained; according to the Achard wear calculation formula, the wearing depth at the grid node is calculated; according to the wearing depth, a new coordinate of the grid node is calculated. By a mesh generation means, the target region is discrete, the quantitative relationship among contact pressure, the kinematic pair inter-element relative sliding velocity and a wear extent is built, and by visually presenting the post-wear characteristics of the target region, a reference is provided for structure design.

Description

technical field [0001] The invention relates to the technical field of mechanical structure simulation design, in particular to a method for simulating wear of mechanism kinematic pairs based on grid deformation technology. Background technique [0002] One of the main failure modes of mechanical products is the surface wear of parts. Most of the parts have static or dynamic contact and cooperation with other parts. When the load acts on the surface, friction and wear occur. When the wear accumulates to a certain extent, the dimensional changes of the parts exceed the allowable range and the parts are scrapped. The service life of parts is largely limited by surface wear. [0003] The wear mechanism of the surface of parts is very complex, not only related to the material properties of the parts themselves, but also closely related to the interaction between parts. At present, the theoretical research and experimental research on the surface wear of parts have high technica...

AI Technical Summary

Problems solved by technology

Most of the parts have static or dynamic contact and cooperation with other parts. When the load acts on the surface, friction and wear occur. When the wear accumulates to a certain extent, the dimensional changes of the parts exceed the allowable range and the parts are scrapped.

Component life is largely limited by surface wear

[0003] The wear mechanism of the surface of parts is very complicated, which is not only related to the material properties of the parts themselves, but also closely related to the interaction between parts. At present, the theoretical research and experimental research on the surface wear of parts have high technical difficulties.

Images