A Deterministic Contact Model Considering the Interaction between Asperities

doi:10.7652/xjtuxb201803013

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A Deterministic Contact Model Considering the Interaction between Asperities

更新时间：2025-07-09

- A Deterministic Contact Model Considering the Interaction between Asperities
- Vol. 52, Issue 3, Pages: 91-97(2018)
- 作者机构：
  
  1. 重庆大学汽车工程学院,重庆,400044
  2. 河南农业大学机电工程学院,郑州,450002
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201803013
  CLC： O343.3
- Online First：10 March 2018，
  
  Published：2018
- 稿件说明：
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A Deterministic Contact Model Considering the Interaction between Asperities[J]. 2018, 52(3): 91-97.
DOI：

A Deterministic Contact Model Considering the Interaction between Asperities[J]. 2018, 52(3): 91-97. DOI： 10.7652/xjtuxb201803013.

摘要

为了分析粗糙表面上微凸体相互作用对接触特性造成的影响

在确定性接触模型的基础上

通过增加几何重叠和固体表面能等约束条件

并且根据材料守恒原理对相互作用的微凸体进行合并。通过不同的法向变形量、采样间隔和粗糙度

分析微凸体相互作用对接触面积、峰数量、平均峰半径和峰高度的影响

并且与未考虑微凸体相互作用的结果进行对比。结果表明:不论是否考虑微凸体相互作用

接触面积与法向载荷的关系均为线性

这与已有结论是吻合的; 对于小的法向变形量和大的采样间隔

微凸体相互作用可以忽略

但随着法向变形量增加、采样间隔减小以及不同的粗糙度

对接触特性的影响愈加明显

与未考虑微凸体相互作用的结果相比

微凸峰数量减少

而接触面积、平均峰半径和峰高度增加。引入几何重叠和固体表面能为考虑微凸体相互作用提供了一个行之有效的研究方法。

Abstract

The interaction between asperities is considered to investigate the contact properties of rough surfaces. This is achieved by adding constraints of overlapping contact spots and the surface energy of solid to the deterministic contact model

and merging them to form an integral one with equivalent area. The effects of the interaction between asperities on the contact area

the number of asperity peaks

the mean asperity-peak radius and height are analyzed through different normal displacements

sampling intervals and roughness values

and compared with the results of independent asperities. The results show that the linearity between contact area and normal load agrees well with existing work

no matter whether the interaction between asperities is taken into account. At small normal displacements and large sampling intervals

the interaction between asperities is almost negligible. However

the interaction may become more significant when larger normal displacements

smaller sampling intervals and different roughness values are applied

leading to the decrease of the number of asperity peaks

and the increase of the contact area

mean asperity-peak radius and peak height in contrast to the results of independent asperities. It can provide an effective method to consider the asperity interaction by introducing geometrical overlap and surface energy of solid.

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Keywords

references

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