Surface Roughness, Texture, and Tribology Full Course

[LeeAndro]

Last Updated 05/2022MP4 | Video: h264, 1280x720 | Audio: AAC, 44.1 KHz, 2 ChGenre: eLearning | Language: English + srt | Duration: 60 lectures (11h 15m) | Size: 9.1 GB

Master the basics of surface texture/surface roughness
Apply filters and surface texture parameters to analyze surface roughness measurements
Learn how surface texture affects applications such as wear, appearance, paint finishes, noise, vibration, and sealing
Understand the dynamics of dry friction, rolling friction, and lubricated friction, and the relationships between friction and surface roughness

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This course covers both basic and advanced topics in surface roughness, texture and friction.​

We build on introductory material in the first sections to cover applications and advanced topics in later sections.

How do you design an ee that can go 100,000 miles between oil changes How do you make soles for sneakers that help an athlete to stop fast, change, direction, and accelerate Can we apply the "stickiness" of a gecko's feet to create adhesives that can be used around the house

Surface finish affects how components function, look, and wear, in applications from ees to footwear to hip joints. There's a common perception in industry that surface texture is a number that you read from a gauge-some target value to be achieved. But the reality is much more interesting and complex.

Dr. Donald Cohen, one of the country's foremost experts in surface roughness, has been leading classes in surface roughness, friction, and tribology for over twenty years. Dr. Cohen's classes focus on surface texture analysis and how surface texture relates to functions such as wear, fit, and friction. The training is designed for scientists, eeers, technicians and students working in the fields of automotive, medical devices, aerospace, materials, polymers, and others.

The ten modules of this class focus on the following topics (these ten modules are also available individually on udemy)

1. Introduction to surface texture and measurement

Why is surface texture important

Instruments for measuring surface roughness and texture

Correlation between measurement instruments

This module is available for free, as an introduction to the class and to surface texture in general.

2. Filtering of surface texture measurements

How spatial wavelengths/frequencies make up surface texture

Roughness vs waviness vs form

Setting cutoff wavelengths

Specifying texture per the ISO 1302 and ASME 14.36 standards

Much of the following course material builds on this module, so we recommend it as a starting point.

3. Surface texture parameters

Introduction to common 2D and 3D surface texture parameters

Amplitude (height) parameters

Spatial parameters

Hybrid parameters

Functional parameters

The best parameters for various applications and functions.

4. Wear

Wear mechanisms and how they progressively modify a surface and alter its functionality

Surface texture parameters for quantifying wear

The relationships between wear and material properties.

5. Dry Friction

The mechanisms of friction in non-lubricated systems

Measuring friction and parameters for quantifying friction

How surface texture relates to friction

The "area of real contact"

Plastic and elastic deformation.

6. Lubricated Friction

The mechanisms of lubricated friction and how it is quantified

Lubricants and lubricant properties (viscosity)

The effects of surface texture in lubricated systems

The hydrodynamic, elastohydrodynamic, mixed and boundary regimes

How friction differs in each of these regime.

7. Rolling friction

The mechanisms of dry, rolling friction

Definitions and difference between tractive rolling, tractive friction, and rolling friction

The reasons why rolling friction is so much lower than sliding friction

The relationship between surface texture, lubrication, and rolling friction.

8. Surface Energy, Wetting and Surface Roughness

The relationship between surface energy and surface wetting

The dynamics that detee how a liquid will react on a surface

The role of surface texture on whether a liquid will wet a surface

Hydrophilic and hydrophobic surfaces

Surface modifications to achieve a desired wettability.

9. Seals, Sealing, and Surface Finish

Types of sealing systems and materials

Impact of surface roughness and waviness

Surface texture parameters for sealing applications

Virtual gaskets (aka "morphological filters")

The Bearing Ratio (or Material Ratio) curve and its application to seals.

10. Coatings: Surface Roughness from Substrate to Topcoat

How the surface texture of the substrate and each level of a coating system affects final appearance

Instruments for measuring paint appearance

Specifications for controlling spatial wavelength bands on substrates and coating layers.

Each of these modules is also available independently on udemy. Note that you save 20% by purchasing this full course.

This class may be for you if you

work in manufacturing, quality, or design eeering

want to learn how surface texture affects performance

need to solve problems related to surface texture in your work or research

are a student exploring any of these areas.

Eeers, technicians, scientists, and students in fields such as automotive, medical devices, aerospace, materials, polymers, etc.

HomePage:

https://anonymz.com/https://www.udemy.com/course/surface-roughness-texture-and-tribology-full-course/

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