Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Rolling Resistance01:21

Rolling Resistance

358
When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
For instance, imagine a hard cylinder rolling on a comparatively soft surface. The cylinder's weight compresses the surface beneath it. As the cylinder moves, the material in front of it slows down...
358
Bearings: Problem Solving01:24

Bearings: Problem Solving

329
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...
329
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

458
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
458
Types of Friction Problems01:27

Types of Friction Problems

641
Friction is an essential concept in physics, engineering, and everyday life. It is the force that opposes the relative motion or tendency of such motion between two surfaces in contact. One of the most common types of friction encountered in various applications is dry friction. Dry friction problems can be broadly categorized into three types, each with unique characteristics and challenges.
The first type of dry friction problem involves situations where there is no apparent impending motion....
641
Dry Friction01:30

Dry Friction

468
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
468
Frictional Force01:07

Frictional Force

8.4K
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
8.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Differential thermal stability of mRNA, miRNA and lncRNA in purified human tissue-derived RNA extracts: a proof-of-principle study with forensic implications.

Legal medicine (Tokyo, Japan)·2026
Same author

Association between bisphenols A and the risk of endometriosis: results from an updated meta-analysis.

Frontiers in public health·2026
Same author

SARS-CoV-2 Nsp1 suppresses the canonical NF-κB pathway by promoting ubiquitin-dependent degradation of TAK1 kinase.

PLoS pathogens·2026
Same author

Comprehensive immune profiling reveals IFN-γ signaling in T cells mediates parasite phagocytosis in a rodent malaria model.

mBio·2026
Same author

Dual role of Oct4 and Sox2 in controlling the developmental capacity and timing of tissue morphogenesis in the embryonic lineage.

Developmental cell·2025
Same author

Tracking Chromium Evolution on Ceria from Particles to Single Atoms: A Catalyst Regeneration Strategy for Ammonia Oxidation.

Journal of the American Chemical Society·2025

Related Experiment Video

Updated: Sep 16, 2025

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry
08:47

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry

Published on: February 2, 2018

12.3K

Contact Resistance Modeling Under Complex Wear Conditions Based on Fractal Theory.

Changgeng Zhang1,2, Xiaoxiao Liu1,2, Liang Jin1,2

  • 1State Key Lab of Intelligent Power Distribution Equipment and System, College of Electrical Engineering, Hebei University of Technology, Tianjin 300401, China.

Materials (Basel, Switzerland)
|July 12, 2025
PubMed
Summary

Electromagnetic rail launchers experience wear on rail surfaces during hypervelocity launches. This study reveals how rail surface roughness changes with wear, impacting electrical contact resistance and launcher performance.

Keywords:
contact resistancefractal theoryrail wearsurface profile

More Related Videos

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
11:05

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

Published on: December 13, 2016

12.3K
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

Published on: September 11, 2018

11.4K

Related Experiment Videos

Last Updated: Sep 16, 2025

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry
08:47

Mimicking and Measuring Occlusal Erosive Tooth Wear with the "Rub&Roll" and Non-contact Profilometry

Published on: February 2, 2018

12.3K
Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
11:05

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes

Published on: December 13, 2016

12.3K
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

Published on: September 11, 2018

11.4K

Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Electromagnetic launchers achieve hypervelocities, leading to extreme conditions on rail and armature surfaces.
  • High current density, temperature, and strain during launch cause significant wear, affecting launcher performance.

Purpose of the Study:

  • To investigate rail surface wear conditions in electromagnetic launchers.
  • To analyze the relationship between rail wear state and contact resistance.
  • To understand the evolution of static contact resistance under wear conditions.

Main Methods:

  • Conducted electromagnetic launch tests to induce and study rail wear.
  • Measured and analyzed 2D profile and morphological characteristics of abraded rail surfaces.
  • Developed a static contact resistance model based on fractal theory.
  • Measured contact resistance at various positions to track its evolution.

Main Results:

  • Rail surface wear transitions from mechanical to electrical wear along the launch direction.
  • The 2D profile of the rail surface becomes smoother with increased abrasion.
  • Rail surface roughness generally decreases with wear.
  • Higher initial roughness leads to greater sensitivity of contact resistance to external load changes.

Conclusions:

  • Rail surface wear significantly alters its topography and electrical properties.
  • Understanding wear-induced changes is crucial for optimizing electromagnetic launcher design and reliability.
  • The developed fractal-based model provides insights into contact resistance behavior under wear.