chap1_present_1_310111_E.pptx - CHAPTER 1 INTRODUCTION TO...

CHAPTER 1
INTRODUCTION TO
TRIBOLOGY
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1.1 Definition of Tribology
Contents
1.2 History of Tribology
1.3 Importance of Tribology
1.4 Research in Tribology
1.5 Tribological Components and Applications

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Upon completing this chapter, you should be able to:
Learning objectives
1. Define tribology.
2. Understand the history and importance of
tribology.
3.Identify the tribological components/machine
elements/ and their applications in machine design
and operation.

Introduction
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Tribology is the branch of engineering that
deals with the interaction of surfaces in
relative motion (as in bearings or gears):
their design
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friction
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Adhesion
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lubrication
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and wear
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1.1 Definition of tribology
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“Tribology” is derived from the Greek word ‘tribos’
meaning rubbing or sliding.
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It is the study of rubbing or sliding.
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Tribology focuses on friction , wear and lubrication of
interacting surfaces in relative motion (1967)
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Tribology is an applied art and as such should be
based upon, or requires background knowledge, in
many topics.
In mechanical engineering (the seat of most design
instruction):
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Fluid mechanics ,
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Elasticity,
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Material science ,
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Dynamics,
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Heat transfer , Methods of mechanical design and the
like.
But the complete tribologist will have added some
knowledge
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Plasticity
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Contact mechanics
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Surface Chemistry, (oxidation, adhesion, adsorption),
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Lubricant Chemistry and the like.