Publication

The simulation and classification of contact clusters between rough surfaces

2019
Student Projects

Abstract

The contact area of rough surfaces has a great influence on many mechanical process in tribology. In this report, we used the simulation method to study the contact area between two rough surfaces and its evolution when sliding. We generated artificial self-affine rough surfaces by regularizing the power-spectrum density. We also developed a 3-dimensional connectivity model to deal with the problem of contact cluster classification. The model is able to assign correct labels to all contact clusters even if there are merging or spliting among clusters. The following sliding test shows that the remaining contact area in cluster scale follows a new pattern while evolving with slidng distance, which is different from the exponential-decay rule in macroscopic scale.

Official source

https://infoscience.epfl.ch/entities/publication/c5a227fa-4787-4bce-b087-9b6178e904a4

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2019
Student Projects

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c5a227fa-4787-4bce-b087-9b6178e904a4

About this result

Related concepts (32)

Microscopic scale

The microscopic scale () is the scale of objects and events smaller than those that can easily be seen by the naked eye, requiring a lens or microscope to see them clearly. In physics, the microscopic scale is sometimes regarded as the scale between the macroscopic scale and the quantum scale. Microscopic units and measurements are used to classify and describe very small objects. One common microscopic length scale unit is the micrometre (also called a micron) (symbol: μm), which is one millionth of a metre.

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A simulation is the imitation of the operation of a real-world process or system over time. Simulations require the use of models; the model represents the key characteristics or behaviors of the selected system or process, whereas the simulation represents the evolution of the model over time. Often, computers are used to execute the simulation. Simulation is used in many contexts, such as simulation of technology for performance tuning or optimizing, safety engineering, testing, training, education, and video games.

Sphere of influence

In the field of international relations, a sphere of influence is a spatial region or concept division over which a state or organization has a level of cultural, economic, military or political exclusivity. While there may be a formal alliance or other treaty obligations between the influenced and influencer, such formal arrangements are not necessary and the influence can often be more of an example of soft power. Similarly, a formal alliance does not necessarily mean that one country lies within another's sphere of influence.

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The simulation and classification of contact clusters between rough surfaces

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