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Lubricants, Volume 7, Issue 4

2019 April - 10 articles

Cover Story: In this study, we predicted the wear of tibial inserts made of UHMWPE (ultrahigh-molecular-weight polyethylene), PEEK (polyetheretherketone), and CFR-PEEK (carbon fiber-reinforced polyetheretherketone) via finite-element (FE) analysis under a gait cycle. The volumetric wear and wear depth of CFR-PEEK decreased by 87.4% and 61.3%, respectively, compared with those of the UHMWPE, whereas PEEK exhibited increased volumetric wear and wear depth. These results suggest that CFR-PEEK is a good alternative to UHMWPE as suitable material for tibial inserts used in total knee arthroplasty (TKA). However, orthopedic research should be performed to evaluate the threshold conditions and appropriate applications for the newly developed biomaterial. View this paper.
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Articles (10)

  • Article
  • Open Access
30 Citations
6,190 Views
18 Pages

A Chemical, Mechanical, and Tribological Analysis of DLC Coatings Deposited by Magnetron Sputtering

  • Giulia Fiaschi,
  • Alberto Rota,
  • Antonio Ballestrazzi,
  • Diego Marchetto,
  • Enrico Vezzalini and
  • Sergio Valeri

Diamond-like carbon is one of the most studied and used solid lubricants on the market. Despite this large use and its outstanding mechanical and tribological properties, there are still some unclear aspects related to its self-lubricant properties,...

  • Article
  • Open Access
32 Citations
6,896 Views
9 Pages

Deep eutectic ionic liquids (DES) possess similar properties to conventional ionic liquids (ILs). However, ILs cannot be considered as environmentally friendly compounds due to both its processing and synthesis, which could have significant polluting...

  • Article
  • Open Access
15 Citations
5,082 Views
15 Pages

Tribological Anti-Wear and Extreme-Pressure Performance of Multifunctional Metal and Nonmetal Doped C-based Nanodots

  • Agnieszka Maria Tomala,
  • Vijay Bhooshan Kumar,
  • Ze’ev Porat,
  • Remigiusz Michalczewski and
  • Aharon Gedanken

Carbon nanodots (CDs) are extensively explored due to their low toxicity, excellent water solubility and biocompatibility. Particularly, fluorescent CDs have received ever-increasing attention. Nevertheless, only a few works have been published on me...

  • Article
  • Open Access
7 Citations
6,518 Views
21 Pages

Modeling the Contact Mechanics of Hydrogels

  • Martin H. Müser,
  • Han Li and
  • Roland Bennewitz

A computationally lean model for the coarse-grained description of contact mechanics of hydrogels is proposed and characterized. It consists of a simple bead-spring model for the interaction within a chain, potentials describing the interaction betwe...

  • Article
  • Open Access
43 Citations
10,860 Views
11 Pages

Development of an Oil Free Water-Based Lubricant for Gear Applications

  • Nadine Sagraloff,
  • Andreas Dobler,
  • Thomas Tobie,
  • Karsten Stahl and
  • Jens Ostrowski

The aim of the current research is to develop a gear transmission fluid based on water and plant extract. Up to now, mineral or synthetic oils are used as lubricants in most gear drive applications. These oils are made of fossil raw materials and are...

  • Article
  • Open Access
22 Citations
6,113 Views
18 Pages

Polymer-based materials show to be of increasing interest in replacing metal based materials in tribological applications due to their low weight, cost and easy manufacturability. To further reduce the environmental impact of these bearing materials...

  • Article
  • Open Access
36 Citations
4,469 Views
10 Pages

The use of fuel mixtures of diesel and vegetable oils in diesel engines is a field of research due to the necessity of reducing pollution. Besides the properties required for the normal operation of diesel engines, other aspects that must be investig...

  • Article
  • Open Access
17 Citations
10,824 Views
19 Pages

Lubrication Analyses of Cam and Flat-Faced Follower

  • Hazim U. Jamali,
  • Amjad Al-Hamood,
  • Oday I. Abdullah,
  • Adolfo Senatore and
  • Josef Schlattmann

The principal factors that affect the characteristics of contact problem between cam and follower vary enormously during the operating cycle of this mechanism. This includes radius of curvature, surface velocities and applied load. It has been found...

  • Article
  • Open Access
31 Citations
7,352 Views
14 Pages

The wear of tibial inserts in total knee arthroplasty (TKA) remains a major limitation of longevity. However, wear tests are expensive and time-consuming. Computational wear prediction using a finite-element (FE) model followed by validation through...

  • Article
  • Open Access
12 Citations
6,201 Views
17 Pages

Film thickness is the most important parameter of a lubricated contact. Its evaluation in a cam-follower contact is not easy due to the continuous variations of speed, load and geometry during the camshaft rotation. In this work, experimental apparat...

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Lubricants - ISSN 2075-4442