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Polymers
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New Developments in Fiber Reinforced Polymer Materials
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New Developments in Fiber Reinforced Polymer Materials

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Composites and Nanocomposites".

Deadline for manuscript submissions: closed (20 June 2023) | Viewed by 12977

Special Issue Editor

Dr. Mayakrishnan Prabakaran

E-Mail Website
Guest Editor
Department of Crop Science, College of Sanghur Life Science, Konkuk University, Seoul 05029, Korea
Interests: material science; corrosion science; electrochemistry; spectroscopy; analytical chemistry; green chemistry; natural product chemistry; bio science; food chemistry; nanotechnology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

I am pleased to invite you to contribute your research articles, review articles as well as short communications, perspectives, and other technical notes for the Special Issue entitled “New Developments in Fiber Reinforced Polymer Materials.” FRP composites have been recognized as the most promising and emerging materials available on the global market. Recently, composite structures reinforced with synthetic or natural fibers are gaining more importance as the demand for high-strength lightweight components in polymeric materials. Fiber-reinforced polymer (FRP) is significantly advantageous because of its nonconductive and non-corrosion properties. Fiber–matrix formulation enables the composite material with better mechanical properties than its plain matrix, resulting in a stronger, stiffer, and more durable composite. In addition, FRP composites are gaining attention because of their eco-friendly nature and sustainability. The main aim of this Special Issue is to provide a platform for academicians and researchers worldwide to publish their work on natural/synthetic fibers, properties of FRP composites related to various experimental studies, analytical and numerical simulation of fiber reinforcing systems, load transfer analysis, multi-scale reinforcing systems, fiber–matrix delamination, non-destructive evaluation, fatigue, aging, polymers, corrosion, and its relevant engineering fields.

Dr. Mayakrishnan Prabakaran
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • natural and synthesis fibers
  • geopolymers
  • polymers
  • corrosion applications
  • properties characteristics
  • composites materials
  • recycle and degradable wastes
  • fiber-reinforced polymer composite
  • reinforcing fiber
  • polymer matrix

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Published Papers (4 papers)

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Research

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22 pages, 11415 KiB  
Article
Evaluating Residual Stress in Carbon Fiber-Reinforced Polymer (CFRP) at Microscale Using Fiber Push-Out Experiment and Finite Element Modeling
by Quy Tung Linh Vu, Guillaume Seon, Sarvenaz Ghaffari, Andrew Makeev, Frédéric Lachaud, Miguel Charlotte and Yves Gourinat
Polymers 2023, 15(12), 2596; https://doi.org/10.3390/polym15122596 - 7 Jun 2023
Cited by 4 | Viewed by 2628
Abstract
Microscale residual stress may develop during the manufacturing of Carbon Fiber-Reinforced Polymer (CFRP) composites and negatively affect apparent macroscale mechanical properties. Accordingly, accurately capturing residual stress may be essential in computational methods used for composite material design. This work presents a new data-driven [...] Read more.
Microscale residual stress may develop during the manufacturing of Carbon Fiber-Reinforced Polymer (CFRP) composites and negatively affect apparent macroscale mechanical properties. Accordingly, accurately capturing residual stress may be essential in computational methods used for composite material design. This work presents a new data-driven methodology for the evaluation of microscale residual stress in CFRPs using fiber push-out experiments with in situ scanning electron microscopy (SEM) imaging. SEM images reveal significant through-thickness matrix sink-in deformation in resin-rich areas after nearby fibers are pushed out, which is attributed to the release of microscale process-induced residual stress. The sink-in deformation is measured experimentally, and a Finite Element Model Updating (FEMU) method is used to retrieve the associated residual stress. The finite element (FE) analysis includes simulation of the curing process, test sample machining, and fiber push-out experiment. Significant out-of-plane matrix deformation larger than 1% of the specimen thickness is reported and associated with a high level of residual stress in resin-rich areas. This work emphasizes the importance of in situ data-driven characterization for integrated computational materials engineering (ICME) and material design. Full article
(This article belongs to the Special Issue New Developments in Fiber Reinforced Polymer Materials)
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18 pages, 14134 KiB  
Article
Effect of Process Parameters on Void Distribution, Volume Fraction, and Sphericity within the Bead Microstructure of Large-Area Additive Manufacturing Polymer Composites
by Neshat Sayah and Douglas E. Smith
Polymers 2022, 14(23), 5107; https://doi.org/10.3390/polym14235107 - 24 Nov 2022
Cited by 19 | Viewed by 2995
Abstract
Short carbon fiber-reinforced composite materials produced by large-area additive manufacturing (LAAM) are attractive due to their lightweight, favorable mechanical properties, multifunctional applications, and low manufacturing costs. However, the physical and mechanical properties of short carbon-fiber-reinforced composites 3D printed via LAAM systems remain below [...] Read more.
Short carbon fiber-reinforced composite materials produced by large-area additive manufacturing (LAAM) are attractive due to their lightweight, favorable mechanical properties, multifunctional applications, and low manufacturing costs. However, the physical and mechanical properties of short carbon-fiber-reinforced composites 3D printed via LAAM systems remain below expectations due in part to the void formation within the bead microstructure. This study aimed to assess void characteristics including volume fraction and sphericity within the microstructure of 13 wt% short carbon fiber acrylonitrile butadiene styrene (SCF/ABS). Our study evaluated SCF/ABS as a pellet, a single freely extruded strand, a regularly deposited single bead, and a single bead manufactured with a roller during the printing process using a high-resolution 3D micro-computed tomography (µCT) system. Micro voids were shown to exist within the microstructure of the SCF/ABS pellet and tended to become more prevalent in a single freely extruded strand which showed the highest void volume fraction among all the samples studied. Results also showed that deposition on the print bed reduced the void volume fraction and applying a roller during the printing process caused a further reduction in the void volume fraction. This study also reports the void’s shape within the microstructure in terms of sphericity which indicated that SCF/ABS single freely extruded strands had the highest mean void sphericity (voids tend to be more spherical). Moreover, this study evaluated the effect of printing process parameters, including nozzle temperature, extrusion speed and nozzle height above the printing table on the void volume fraction and sphericity within the microstructure of regularly deposited single beads. Full article
(This article belongs to the Special Issue New Developments in Fiber Reinforced Polymer Materials)
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17 pages, 4273 KiB  
Article
Study on Flexural Behaviour of Ferrocement Composites Reinforced with Polypropylene Warp Knitted Fabric
by Manickam Rameshkumar, Ramalingam Malathy, Priyalatha Chandiran, Sundararajan Paramasivam, Ill-Min Chung, Seung-Hyun Kim and Mayakrishnan Prabakaran
Polymers 2022, 14(19), 4093; https://doi.org/10.3390/polym14194093 - 29 Sep 2022
Cited by 6 | Viewed by 2510
Abstract
Ferrocement is a cost-effective construction material used in the low-cost constructions. It is produced with the combination of cement mortar with closely spaced wire mesh known as chicken wire mesh. Ferrocement process eliminates coarse aggregates when compared to reinforced concrete thus makes the [...] Read more.
Ferrocement is a cost-effective construction material used in the low-cost constructions. It is produced with the combination of cement mortar with closely spaced wire mesh known as chicken wire mesh. Ferrocement process eliminates coarse aggregates when compared to reinforced concrete thus makes the process simple. This paper deals with the influence of various characteristics of warp knitted fabric on the flexural properties of ferrocement composites. Ferrocement composites have a wide range of applications in the construction industry and it has some limitations due to the durability issues. Among the various durability issues, corrosion is one of the main issues to be addressed to enhance the long-term service life of the ferrocement composites. The idea of using non-metallic mesh to eliminate the corrosion problem is discussed in this paper. In this experiment, warp knitted fabric reinforced ferrocement composites were produced using polypropylene warp knitted fabrics. This paper deals with the flexural properties of ferrocement composites made of warp knitted fabric coated with expoxy. This paper deals with the flexural properties of ferrocement composites made of warp knitted fabric coated with expoxy. These composites were analyzed for their flexural strength, energy absorption and ductile property. The variables in the experiment are filament thickness, warp knitted structure and number of layers in the composites. Experimental results proved that the replacement of chicken mesh wire by warp knitted fabrics has an impact in the flexural properties of the composites and the effect of variables in the experiment set up has been analyzed. There is an imporvement of 200% is observed in the first crack load and 120% improvement in the ultimate load of the warp knit fabric reinforced composite compared to control sample. Experimental results proved that there is an increase in flexural strength of ferrocement composites made up with warp knitted fabrics. Microstructure studies like SEM and EDX on ferrocement laminates confirmed good bonding between the mortar mix and warp knitted fabrics. Full article
(This article belongs to the Special Issue New Developments in Fiber Reinforced Polymer Materials)
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Review

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31 pages, 5693 KiB  
Review
A Review on Fresh, Hardened, and Microstructural Properties of Fibre-Reinforced Geopolymer Concrete
by Prabu Baskar, Shalini Annadurai, Kaviya Sekar and Mayakrishnan Prabakaran
Polymers 2023, 15(6), 1484; https://doi.org/10.3390/polym15061484 - 16 Mar 2023
Cited by 13 | Viewed by 3669
Abstract
Alternative eco-friendly and sustainable construction methods are being developed to address growing infrastructure demands, which is a promising field of study. The development of substitute concrete binders is required to alleviate the environmental consequences of Portland cement. Geopolymers are very promising low-carbon, cement-free [...] Read more.
Alternative eco-friendly and sustainable construction methods are being developed to address growing infrastructure demands, which is a promising field of study. The development of substitute concrete binders is required to alleviate the environmental consequences of Portland cement. Geopolymers are very promising low-carbon, cement-free composite materials with superior mechanical and serviceability properties, compared to Ordinary Portland Cement (OPC) based construction materials. These quasi-brittle inorganic composites, which employ an “alkali activating solution” as a binder agent and industrial waste with greater alumina and silica content as its base material, can have their ductility enhanced by utilising the proper reinforcing elements, ideally “fibres”. By analysing prior investigations, this paper explains and shows that Fibre Reinforced Geopolymer Concrete (FRGPC) possesses excellent thermal stability, low weight, and decreased shrinking properties. Thus, it is strongly predicted that fibre-reinforced geopolymers will innovate quickly. This research also discusses the history of FRGPC and its fresh and hardened properties. Lightweight Geopolymer Concrete (GPC) absorption of moisture content and thermomechanical properties formed from Fly ash (FA), Sodium Hydroxide (NaOH), and Sodium Silicate (Na2SiO3) solutions, as well as fibres, are evaluated experimentally and discussed. Additionally, extending fibre measures become advantageous by enhancing the instance’s long-term shrinking performance. Compared to non-fibrous composites, adding more fibre to the composite often strengthens its mechanical properties. The outcome of this review study demonstrates the mechanical features of FRGPC, including density, compressive strength, split tensile strength, and flexural strength, as well as its microstructural properties. Full article
(This article belongs to the Special Issue New Developments in Fiber Reinforced Polymer Materials)
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