Thermal-Structural Analyze Of Concave Bionic Non-smooth Surface And Study Of Its Abrasion Resistance Capability

Abrasion is the one of the major reason for failure of material and mechanical equipments; it will cost great loss in economy and resource. There are various factors in process of abrasion; heat effect is one of most important factors, the temperature variety brought by heat of friction will influence the constitutive relationship and the microstructure change of material. The method of using Bionic non-smooth surface is a effective and environmental-friendly new way to enhance the abrasion-resistance of material. This paper takes a kind of Bionic non-smooth concave surface as research object, take the finite element analyze software ANSYS as research tool, through the study to thermal-structural characteristic of this kind of surface in the condition of slide friction, to recover the reason of the influence of the surface structure to the capability of abrasion-resistance. This paper approves theory and experiment reference for the rising bionic surface engineering technology.This paper design 9 experiments by Orthogonal Experiment method in consider of realize machining capability, the hardware condition in analyze and reference documentation to make finite element numerical analyzes to different distributing concave surface under the same slide velocity and normal load. This paper using augmented Lagrange multiplier method to realize contact relationship between friction pairs, and using thermo elastic theory to depict the heat generate and transfer during experiments. Through comparison the quantity and distributing of temperature and equivalent effective stress between smooth and non-smooth surface, to research concave characteristic for its abrasion-resistance capability.Through a lot of calculation, the qualitative and quantitative conclusions are as follows: (1) Compared with smooth surface, the mean temperature and equivalent effective stress are lower in the concave surface, concave surfaces are also more disperse in the dissipate of temperature and equivalent effective stress. (2) Among the 9 experiments in the paper, No.7 experiment got the best result in optimize the thermal-structural characteristic, the form is 1200um in width, 300um in depth and 600um in distance. (3) Make range analyze to the experiments result, got the most influence parameter for mean temperature is width, for temperature dissipate is depth, for mean equivalent effective stress and its dissipate is also width and depth. (4) Analyze to the node inside and around the concave, this paper consider that the exit of concave reduce the rigidity of the structure and make more strain, absorb more energy the friction brought. And inside the concave, node contact with the environment and make convection, in actually increase the thermal contact resistance and reduce the heat transfer. (5) Discuss reasons of concave surface to make material more abrasion-resistance, such as moment effect and induct effect in grinding abrasion and optimize oil film dissipate in condition of lubricate.