Entrepreneur. Educator. Automotive engineer. University of Leeds Graduate. M.Sc in Automotive engineering. PhD aspirant.

Srikanth Reddy

In this course, the educator gives you an inside view on Tribology topic. It is suitable for Mechanical engineers willing to learn the fundamentals of the subject with emphasis on Friction, wear, and Lubrication. Primarily suitable for people associated with mechanical engineering

English

Introduction to Tribology: Mechanical Engineering

This lesson gives you a broad introduction to relatively new topic called "Tribology". This lesson gives a detailed course overview and various terms have been defined .

Introduction to Tribology - Part 1

This lesson is continuation to the lesson titled "Introduction to Tribology - part 1". It lays emphasis on in-direct contact, history , scope and importance of Tribology. You will learn why and how tribology impacts the industry and society as a whole

Introduction to Tribology - Part 2

The first half of the second chapter of UNIT 1 is covered in this lesson. It covers the tribological factors that influence the design of a tribological or mechanical system .
Factors like Materials and surfaces have been covered.

Tribological factors

In this chapter, we study how lubricants and operating conditions influence the design of tribological system /interface and also the interaction of  surfaces with (each other and also with the lubricant in between them)

Tribological factors - Part 2

This lesson lays emphasis on elastic and plastic contacts of smooth surfaces. The Hertzian mechanics will be introduced in this lesson

Smooth surfaces and their contact - Part 1

The Equivalent Hertzian contact of a solid and rigid plane will be explained in this particular lesson. We will see some empirical relations that are used to calculate the contact dimensions and deformation

Smooth surfaces and their contact - Part 2

This lesson completed the Hertzian contact analysis. The contact analysis of two spheres and two cylinders in contact along with importance of traction and practical application of Hertzian analysis will be studied in this lesson.

Hertzian contact Analysis - Continuation

This lesson summarizes the key points of the contact of smooth surfaces with special emphasis on  Hertzian analysis so that the students will understand it better

Contact of smooth surfaces - key Learning points

You will see how deformation, contact dimensions and maximum stress at the point of contact is calculated for a smooth surface (ball) contacting (resting) with a rigid body (flat surface)

Numericals on Hertzian contact analysis - Part 1

In this lesson, we will see a scenario of  a ball resting in a groove of a semi-infinite block. And we go on to compute the contact dimensions, deformation at contact point and also maximum stress. We compare the values with the case where ball rests on a flat surface so the student will have a better appreciation

Numericals on Hertzian contact analysis - Part 2

This lesson explains the case we discussed in lesson - 10. However, the equivalent elastic modulus needs to be calculated.

Numericals on Hertzian contact analysis - Part 3

We will see how a ball rolling on the outside of a circular shaft will deform under high load. This is an interesting case.

Numerical 4 : Hertzian contact analysis

We will see a complicated analysis of ball bearing contact. It is different from all the models we have seen in the previous lessons and helps the students appreciate the concept of conformity better.

Numerical - 5 : Ball bearing Hertzian contact analysis

In this lesson, we Describe the Real Rough surfaces .we talk about the terminology involved with regard to the rough surfaces

Describing Real rough surfaces - Part 1

In this lesson, we talk about four orders of surface irregularities and how they are related to waviness and roughness. We then move on to learn about Qualitative Experimental techniques of assessing the surface irregularities.

Describing Real rough surfaces - Part 2

The quantitative techniques to assess the surface texture are discussed in this lesson.

Experimental techniques to assess Surface texture

In this lesson, you will get introduced the statistical parameters that are required to quantify surface texture.You will see what centre line average roughness is.

Statistical parameters to quantify Surface texture

The root mean square roughness and other common statistical roughness parameters are discussed in this lesson. We will also see some typical roughness values of surfaces from various manufacturing process

Root Mean square and other surface roughness parameters

The example measurements of a turned, ground and a lapped surface of the same steel specimen are shown so that the student gains a better understanding.

Example measurements of surface roughness

The final lesson if this course emphasizes on the lambda ratio and explains the degree of contact between two rough surfaces.

Lessons

20 lessons • 4h 5m

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Introduction to Tribology - Part 1

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Introduction to Tribology - Part 2

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Tribological factors

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Tribological factors - Part 2

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Smooth surfaces and their contact - Part 1

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Smooth surfaces and their contact - Part 2

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Hertzian contact Analysis - Continuation

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Contact of smooth surfaces - key Learning points

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Numericals on Hertzian contact analysis - Part 1

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Numericals on Hertzian contact analysis - Part 2

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