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Lubricants, Volume 8, Issue 9

September 2020 - 9 articles

Cover Story: Adhesion has a tremendous impact on cutting-edge applications, such as the development of nano- and micromechanical systems and bioinspired adhesives. Usually, roughness destroys adhesion; however, with some special types of roughness, adhesion enhancement may occur. In this study, the contact problem of a sphere that is in contact with a wavy axisymmetric single-scale substrate is studied. It is shown that adhesion enhancement either stops for "rigid" materials or is stopped by large waviness amplitudes due to the appearance of internal cracks. The enhancement effect is well captured by an equation in terms of the Johnson parameter. View this paper.
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Articles (9)

  • Article
  • Open Access
6 Citations
3,948 Views
19 Pages

22 September 2020

In the production and gathering process of coal gas, the complex composition of the coal gas, harsh environments, the complex medium, and high content of solid particles in slurry cause the equipment malfunctions and even failure because of erosion a...

  • Review
  • Open Access
27 Citations
9,802 Views
27 Pages

Review on Friction and Wear Test Rigs: An Overview on the State of the Art in Tyre Tread Friction Evaluation

  • Andrea Genovese,
  • Gennaro Antonio D’Angelo,
  • Aleksandr Sakhnevych and
  • Flavio Farroni

16 September 2020

The future evolution of autonomous mobility and road transportation will require substantial improvements in tyre adherence optimization. As new technologies being deployed in tyre manufacturing reduce total vehicle energy consumption, the contributi...

  • Feature Paper
  • Article
  • Open Access
19 Citations
4,095 Views
19 Pages

4 September 2020

Usually, roughness destroys adhesion and this is one of the reasons why the “adhesion paradox”, i.e., a “sticky Universe”, is not real. However, at least with some special type of roughness, there is even the case of adhesion enhancement, as it was s...

  • Article
  • Open Access
12 Citations
4,645 Views
14 Pages

Analytical Elastostatic Contact Mechanics of Highly-Loaded Contacts of Varying Conformity

  • Patricia M. Johns-Rahnejat,
  • Nader Dolatabadi and
  • Homer Rahnejat

2 September 2020

In applications requiring high load carrying capacity, conforming contacting pairs with a relatively large contact footprint are used. These include circular arc, Novikov, and Wildhaber gears found, for example, in helicopter rotors. Closely conformi...

  • Article
  • Open Access
4 Citations
3,454 Views
7 Pages

Using a tribometer equipped with a high-resolution wear measurement unit (RNT), the running-in of a diamondlike carbon (DLC) iron spray coating contact was analyzed and optimized. The optimization comprised an initial parameter field with different l...

  • Review
  • Open Access
24 Citations
6,324 Views
20 Pages

Tribochemistry as an Alternative Synthesis Pathway

  • Hayden Carlton,
  • David Huitink and
  • Hong Liang

While reactions driven by mechanical force or stress can be labeled mechanochemical, those specifically occurring at a sliding interface inherit the name tribochemical, which stems from the study of friction and wear: tribology. Increased perception...

  • Communication
  • Open Access
8 Citations
4,446 Views
7 Pages

Comparative Tribological Properties of Pd-, Pt-, and Zr-Based Bulk Metallic Glasses

  • Marco A. Medina,
  • Ogulcan Acikgoz,
  • Anthony Rodriguez,
  • Chandra S. Meduri,
  • Golden Kumar and
  • Mehmet Z. Baykara

We present a comparative study of the tribological properties of Pd-, Pt-, and Zr-based bulk metallic glasses (BMG-Pd, BMG-Pt, and BMG-Zr, respectively) under unlubricated conditions. In particular, micro-tribometry is utilized with a 52,100 steel ba...

  • Review
  • Open Access
17 Citations
13,787 Views
12 Pages

An Overview of Grease Water Resistance

  • Alan Gurt and
  • Michael Khonsari

Many grease-lubricated components operate in wet environments, making them susceptible to water contamination which degrades their performance, functionality, and useful life. Hence, selecting a grease with appropriate water-resistant properties can...

  • Review
  • Open Access
19 Citations
9,949 Views
21 Pages

A Practical Approach to Gear Design and Lubrication: A Review

  • Dario Croccolo,
  • Massimiliano De Agostinis,
  • Giorgio Olmi and
  • Nicolò Vincenzi

The modern design of mechanical parts, such as gears, goes through the continuous demand for a high level of efficiency and reliability, as well as an increased load carrying capacity and endurance life. The aim of the present paper was to perform a...

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Lubricants - ISSN 2075-4442Creative Common CC BY license