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Related Concept Videos

Journal Bearings01:23

Journal Bearings

813
Journal bearings are mechanical components that support and provide lateral stability to rotating shafts and axles. They are crucial in reducing friction, wear, and vibration in machinery such as engines, turbines, and pumps. The principle behind journal bearings is forming a thin lubricant film between the bearing surface and the rotating shaft, which minimizes direct contact and reduces frictional forces.
To better understand the concept of journal bearings, consider a rope winch with dry or...
813
Bearings: Problem Solving01:24

Bearings: Problem Solving

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Understanding the calculations and concepts related to double-collar bearings is essential for engineers and designers to optimize the performance of these components in various applications. By analyzing the bearing under different conditions, one can ensure that it can withstand the forces and moments experienced during operation. This knowledge enables better decision-making when designing and selecting bearings for specific purposes and configurations. Consider a double-collar bearing with...
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Pivot Bearings01:23

Pivot Bearings

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In mechanical systems, bearings are crucial in facilitating relative motion between two components while minimizing friction and wear. They help distribute various loads (radial, axial or a combination of both loads) across machinery parts, ensuring smooth and efficient operation.
A pivot bearing is a specialized type of bearing designed to support axial loads on a rotating shaft. The bearing surface, or the pivot, is positioned at the end of a shaft to support the axial thrust. The pivot may...
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Design Example: Deciding Thickness of Lubricating Fluid in a Shaft01:23

Design Example: Deciding Thickness of Lubricating Fluid in a Shaft

171
Effective lubrication between a rotating shaft and its bearing housing is essential in rotating machinery to minimize friction, wear, and energy loss. With carefully controlled thickness and viscosity, the lubricant layer prevents metal-to-metal contact, ensuring smooth operation.
To calculate the required thickness of the lubricant layer, the tangential velocity at the shaft's surface must first be determined. This velocity is calculated by converting the rotational speed to angular...
171
Characteristics of Dry Friction01:21

Characteristics of Dry Friction

702
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
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Bearing Stress01:22

Bearing Stress

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Bearing stress refers to the contact pressure between two separate bodies. To visualize this, imagine a bolt thrust through a plate. The bolt applies a force to the plate, which exerts an equal but opposite force back onto the bolt. This force isn't just a singular entity but a compilation of numerous smaller forces distributed across the contact surface between the bolt and the plate.
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
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Related Experiment Video

Updated: Oct 3, 2025

A Friction Testing-Bioreactor Device for Study of Synovial Joint Biomechanics, Mechanobiology, and Physical Regulation
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A Friction Testing-Bioreactor Device for Study of Synovial Joint Biomechanics, Mechanobiology, and Physical Regulation

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Bio-tribology.

Duncan Dowson1

  • 1School of Mechanical Engineering, The University of Leeds, Leeds, LS2 9JT, UK. D.Dowson@leeds.ac.uk

Faraday Discussions
|January 5, 2013
PubMed
Summary

Tribology, the study of friction, lubrication, and wear, has seen significant advancements since its inception. Bio-tribology, a sub-field integrating tribology with biology and medicine, has spurred considerable interest and development.

Area of Science:

  • Tribology
  • Bio-tribology

Background:

  • Tribology, encompassing friction, lubrication, wear, and bearing design, was formally established 46 years ago.
  • The field has since driven substantial improvements in equipment performance, including reciprocating engines and digital devices.
  • The integration of tribology with biology and medicine has led to the emergence of Bio-tribology.

Purpose of the Study:

  • To provide an overview of the developments in the field of Bio-tribology.
  • To highlight the significance of tribological principles in biological and medical applications.

Main Methods:

  • Review of historical developments in tribology.
  • Exploration of the interdisciplinary connections between tribology, biology, and medicine.
  • Synthesis of key advancements in Bio-tribology.

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Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants
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Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
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Related Experiment Videos

Last Updated: Oct 3, 2025

A Friction Testing-Bioreactor Device for Study of Synovial Joint Biomechanics, Mechanobiology, and Physical Regulation
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Biotribological Testing and Analysis of Articular Cartilage Sliding against Metal for Implants
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Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys
07:12

Determining Tribocorrosion Rate and Wear-Corrosion Synergy of Bulk and Thin Film Aluminum Alloys

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Main Results:

  • Tribology has significantly enhanced the reliability and efficiency of mechanical systems like engines.
  • Nano-tribology has been crucial for progress in information processing and digital technology.
  • Bio-tribology has emerged as a vital sub-field with extensive research interest and applications.

Conclusions:

  • The field of tribology has evolved considerably, impacting various technological domains.
  • Bio-tribology represents a significant and growing area of scientific inquiry with broad implications.