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Advanced Characterization of Fiber-Reinforced Composite Materials
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Advanced Characterization of Fiber-Reinforced Composite Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 2014

Special Issue Editors

Dr. Jacopo Donnini

E-Mail Website
Guest Editor
Department of Materials, Environmental Sciences and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy
Interests: characterization of composite materials; advanced cement-based materials; retrofitting and strengthening buildings with composite materials; sustainable composite materials
Special Issues, Collections and Topics in MDPI journals
Dr. Francesca Luzi

E-Mail Website
Guest Editor
Department of Science and Engineering of Matter, Environment and Urban Planning (SIMAU), Polytechnic University of Marche, 60131 Ancona, Italy
Interests: polymeric composites and nanocomposites mechanical behaviour of materials thermal properties active packaging biodegradation of polymers natural fibers ligninocellulosic nanostructures
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to showcase cutting-edge research and innovative methodologies in the characterization of fiber-reinforced composites, which are crucial in advancing their applications in various industrial sectors. We welcome original contributions that explore the interfacial properties and the mechanical, thermal, and chemical–physical behaviors of these materials, utilizing both experimental and computational approaches.

Topics of interest include, but are not limited to, mechanical property analysis, damage mechanics, non-destructive testing (NDT) techniques, thermal analysis, and the characterization of nanocomposites. We are particularly interested in papers that present novel micromechanics models, advanced imaging techniques, and multiscale modeling approaches that provide deeper insights into the behavior and performance of fiber-reinforced composites.

This Special Issue aims to serve as a comprehensive resource for the latest advancements in the field, offering a platform for the dissemination of significant findings that can drive future research and development. We welcome submissions from academia, industry, and research institutions.

Dr. Jacopo Donnini
Dr. Francesca Luzi
Guest Editors

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. Materials 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 2600 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

  • composite materials
  • advanced characterization methods
  • biobased composites
  • non-destructive testing (NDT)
  • fiber-reinforced composites
  • nanocomposites
  • multiscale modeling
  • sustainable composites

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Published Papers (2 papers)

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25 pages, 16103 KiB  
Article
Compressive Response and Damage Distribution of Fiber-Reinforced Concrete with Various Saturation Degrees
by Lu Feng and Xudong Chen
Materials 2025, 18(7), 1555; https://doi.org/10.3390/ma18071555 - 29 Mar 2025
Viewed by 299
Abstract
Tunnels frequently experience issues such as lining spalling and water leakage, making the stability of tunnel support critical for engineering safety. Given that tunnels are subjected to various ground stress disturbances and groundwater influences, it is essential to investigate the mechanical properties and [...] Read more.
Tunnels frequently experience issues such as lining spalling and water leakage, making the stability of tunnel support critical for engineering safety. Given that tunnels are subjected to various ground stress disturbances and groundwater influences, it is essential to investigate the mechanical properties and damage mechanisms of tunnel support materials under different loading paths and saturation levels. Fiber-reinforced concrete (FRC) is widely used for tunnel support; in this study, uniaxial compression tests were conducted on FRC with different fiber contents (0%, 0.5%, 1.0%) under varying loading paths (monotonic, pre-peak cyclic loading, full cyclic loading). The stress–strain behavior, volumetric strain, and elastic modulus were analyzed. The results indicate that increasing fiber content enhances strength and stiffness, while higher water content leads to a significant water-weakening effect, reducing both parameters. To classify crack types, the logistic regression (LR) algorithm is employed based on the AF-RA features, identifying tensile damage (which accounts for 60–80%) as more dominant than shear damage. Using this classification, AE event distributions reveal the spatial characteristics of internal damage in FRC. Gaussian process regression (GPR) is further applied to predict the AE parameters, enabling the assessment of the tensile and shear damage responses in FRC. The location and magnitude of the predicted wave crest indicate extreme damage levels, which become more pronounced under a higher saturation condition. A damage constitutive model is proposed to characterize the post-peak softening behavior of FRC. The numerical verification demonstrates good agreement with the experimental results, confirming the model’s capability to describe the softening behavior of FRC under various fiber and water contents. Full article
(This article belongs to the Special Issue Advanced Characterization of Fiber-Reinforced Composite Materials)
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24 pages, 11094 KiB  
Article
Synergistic Effects of Polypropylene Fibers and Silica Fume on Structural Lightweight Concrete: Analysis of Workability, Thermal Conductivity, and Strength Properties
by Zehra Funda Akbulut, Eva Kuzielová, Taher A. Tawfik, Piotr Smarzewski and Soner Guler
Materials 2024, 17(20), 5042; https://doi.org/10.3390/ma17205042 - 15 Oct 2024
Cited by 5 | Viewed by 1374
Abstract
Structural lightweight concrete (SLWC) is crucial for reducing building weight, reducing structural loads, and enhancing energy efficiency through lower thermal conductivity. This study explores the effects of incorporating silica fume (SF), micro-polypropylene (micro-PP), and macro-PP fibers on the workability, thermal properties, and strength [...] Read more.
Structural lightweight concrete (SLWC) is crucial for reducing building weight, reducing structural loads, and enhancing energy efficiency through lower thermal conductivity. This study explores the effects of incorporating silica fume (SF), micro-polypropylene (micro-PP), and macro-PP fibers on the workability, thermal properties, and strength of SLWC. SF was added to all mixtures, substituting 10% of the Portland cement (PC), except for the control mixture. Macro-PP fibers were introduced alone or in combination with micro-PP fibers at volumetric ratios of 0.3% and 0.6%. The study evaluated various parameters, including slump, Vebe time, density, water absorption (WA), ultrasonic pulse velocity (UPV), thermal conductivity coefficients (k), compressive strength (CS), and splitting tensile strength (STS) across six different SLWC formulations. The results indicate that while SF negatively impacted the workability of SLWC mortars, it improved CS and STS due to the formation of calcium silicate hydrate (C-S-H) gels from SF’s high pozzolanic activity. Additionally, using micro-PP fibers in combination with macro-PP fibers rather than solely macro-PP fibers enhanced the workability, CS, and STS of the SLWC samples. Although SF had a minor effect on reducing thermal conductivity, the use of macro-PP fibers alone was more effective for improving thermal properties by creating a more porous structure compared to the hybrid use of micro-PP fibers. Moreover, increasing the ratio of micro- and macro-PP fibers from 0.3% to 0.6% resulted in lower CS values but a significant increase in STS values. Full article
(This article belongs to the Special Issue Advanced Characterization of Fiber-Reinforced Composite Materials)
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