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Fibers, Volume 11, Issue 7

July 2023 - 9 articles

Cover Story: Fiber-reinforced shotcrete (FRS) is widely used as rock support for tunnels in hard rock. Due to the complexity of the design, empirical and numerical methods and national guidelines are commonly used in the design. Depending on the design approach, the structural capacity is verified through testing on beams or panels. In this paper, finite element simulations are used to investigate if the crack length affects the structural response of FRS. This paper points out that the fiber dosage can be reduced if test methods where longer crack forms, i.e., panels, are used instead of beams. View this paper
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Articles (9)

  • Article
  • Open Access
3 Citations
2,664 Views
16 Pages

Fiber Spinning of Polyacrylonitrile Terpolymers Containing Acrylic Acid and Alkyl Acrylates

  • Ivan Yu. Skvortsov,
  • Mikhail S. Kuzin,
  • Andrey F. Vashchenko,
  • Roman V. Toms,
  • Lydia A. Varfolomeeva,
  • Elena V. Chernikova,
  • Gulbarshin K. Shambilova and
  • Valery G. Kulichikhin

24 July 2023

Terpolymers of acrylonitrile with acrylic acid and alkyl acrylates, including methyl-, butyl-, 2-ethylhexyl-, and lauryl acrylates, were synthesized using the reversible addition–fragmentation chain transfer method. In this study, the focus was...

  • Article
  • Open Access
7 Citations
2,534 Views
12 Pages

Effect of Hydrolysis Regime on the Properties of Fibers Obtained from Recycling Medium-Density Fiberboards

  • Viktor Savov,
  • Petar Antov,
  • Christian Panchev,
  • Muhammad Adly Rahandi Lubis,
  • Seng Hua Lee,
  • Hamid R. Taghiyari,
  • Martina Todorova and
  • Stoyko Petrin

17 July 2023

Unlike the recycling of particleboards, the recycling of medium-density fiberboards (MDF) is not a widespread industrial practice, and currently, most waste MDF panels are landfilled or incinerated after the end of their life cycle. Therefore, it is...

  • Article
  • Open Access
55 Citations
2,540 Views
17 Pages

Tailoring Epoxy Composites with Acacia caesia Bark Fibers: Evaluating the Effects of Fiber Amount and Length on Material Characteristics

  • Sivasubramanian Palanisamy,
  • Mayandi Kalimuthu,
  • Carlo Santulli,
  • Murugesan Palaniappan,
  • Rajini Nagarajan and
  • Cristiano Fragassa

17 July 2023

In recent years, there has been growing interest in utilizing bark fibers as reinforcements for polymer composites. This study focused on the characterization of epoxy composites reinforced with Acacia caesia bark (ACB) fibers, considering their mech...

  • Brief Report
  • Open Access
2 Citations
1,614 Views
10 Pages

14 July 2023

The dispersion properties of surface plasmon polaritons (SPPs) during propagation on metal wires with a dielectric coating in the terahertz frequency range were investigated theoretically. An analytical expression was obtained for a pulsed electric f...

  • Article
  • Open Access
14 Citations
3,676 Views
22 Pages

14 July 2023

In this study, an experimental program was developed to investigate the flexural behavior of pre-damaged reinforced concrete (RC) beams that had been repaired and strengthened using carbon fiber-reinforced polymer (CFRP) laminates under a monotonic l...

  • Article
  • Open Access
3 Citations
2,185 Views
12 Pages

Hi-Accuracy Method for Spectrum Shift Determination

  • Nadezhda Pavlycheva,
  • Ayna Niyazgulyyewa,
  • Airat Sakhabutdinov,
  • Vladimir Anfinogentov,
  • Oleg Morozov,
  • Timur Agliullin and
  • Bulat Valeev

10 July 2023

A new hi-accuracy method for slight-shift determination of low-resolution spectra is proposed. The method allows determining a spectrum shift with an accuracy exceeding the spectrum analyzer resolution to more than three orders of magnitude due to th...

  • Article
  • Open Access
2,477 Views
12 Pages

4 July 2023

Fibre-reinforced shotcrete is an essential part of the support of hard rock tunnels. Due to the complexity of the design, a combination of empirical and numerical analysis is commonly used in the design. The required dosage of fibres for structural p...

  • Review
  • Open Access
14 Citations
10,193 Views
23 Pages

Use of Sawdust Fibers for Soil Reinforcement: A Review

  • Carlos J. Medina-Martinez,
  • Luis Carlos Sandoval Herazo,
  • Sergio A. Zamora-Castro,
  • Rodrigo Vivar-Ocampo and
  • David Reyes-Gonzalez

3 July 2023

A frequent problem in geotechnics is soils with inadequate physical–mechanical properties to withstand construction work, incurring cost overruns caused by their engineering improvement. The need to improve the engineering properties of soils i...

  • Article
  • Open Access
4 Citations
1,727 Views
11 Pages

26 June 2023

Fiber laser sources operating near 2300 nm in the atmospheric transparency window are interesting for different applications, such as remote sensing, lidars, and others. The use of Tm-doped fiber lasers based on tellurite fibers is highly promising....

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Fibers - ISSN 2079-6439Creative Common CC BY license