Mechanical Behaviour of Reinforced Thermosetting Polymers with Fibers: Analytical/Numerical Models and Experimental Evidence

A special issue of Fibers (ISSN 2079-6439).

Deadline for manuscript submissions: 31 December 2024 | Viewed by 2693

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Special Issue Editors


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Faculty of Exact Sciences and Engineering, Department of Civil Engineering and Geology, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
Interests: reinforcement; polymer-matrix composites (PMCs); nanocomposites; metal oxide nanoparticles; thermal and mechanical properties; numerical modeling; refractory castables
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Guest Editor
Department of Mechanical Engineering, University of Coimbra, 3030-788 Coimbra, Portugal
Interests: composites structures; nanocomposite; structural integrity; finite element analysis; biomechanics; impact; non-destructive analysis; mechanical properties
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Department of Civil Engineering and Architecture, University of Beira Interior, Calçada Fonte do Lameiro, 6201-001 Covilhã, Portugal
Interests: structural analysis and design; numerical modelling and optimization; concrete structures; structural materials; building systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recent manufacturing advancements have led to the manufacture of reinforced polymeric composites with the incorporation of natural and inorganic fillers into thermoplastic or thermosetting polymeric matrices. This kind of reinforced material can replace common materials used for example in construction. As it is known, the production of construction materials has been under pressure from public opinion for some decades because of the high level of CO2 emissions associated with this activity. As a consequence, the governmental authorities have been taking some practical measures to make the industry more eco-friendly. For instance, the 2015 Paris Agreement on climate change imposed on the construction industry a reduction in CO2 emissions by 2030. This pressure really forces this industry to intensify the search for new alternative production technologies and materials. Obviously, eco-friendly materials must be also considered as an alternative route of the entire road map to low-emission construction production. For this, reinforced polymeric composites continue to replace traditional materials like steel and aluminum. Concerning the new types of polymeric composites to use in automotive to biomedical fields, almost all of the published works are focused on the development of the reinforced material itself, including the obtained experimental results of thermal and mechanical properties. However, studies proposing reliable analytical or numerical models to forecast the behavior of such materials are still needed. Therefore, the editors of this Special Issue want to group a high number of studies that focuses mainly on the analytical/numerical models, including experimental evidence, to predict the effects of the incorporation of natural and inorganic fillers into thermoplastic or thermosetting polymeric matrices, in order to manufacture reinforced polymeric composites able to replace traditional materials.

Dr. Deesy Gomes Pinto 
Dr. Ana Martins Amaro
Dr. Luís Filipe Almeida Bernardo
Guest Editors

Manuscript Submission Information

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Keywords

  • natural fibers
  • inorganic fillers
  • reinforcement
  • thermoplastic polymeric matrices
  • thermosetting polymeric matrices
  • analytical models
  • numerical models
  • experimental evidence

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Published Papers (2 papers)

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Research

17 pages, 6107 KiB  
Article
Effects of Ply Misalignment in Material Characterization of Composite Laminates
by Michael Franz, Racim Radjef, Boris Eisenbart and Sandro Wartzack
Fibers 2024, 12(12), 103; https://doi.org/10.3390/fib12120103 - 26 Nov 2024
Viewed by 432
Abstract
Carbon fiber reinforced plastic (CFRP) parts find a rising number of applications as structural components. Therefore, new manufacturing technologies are developed, enabling high volume production of such parts. With those higher volumes, variation management during product design becomes more critical. While manufacturing variations [...] Read more.
Carbon fiber reinforced plastic (CFRP) parts find a rising number of applications as structural components. Therefore, new manufacturing technologies are developed, enabling high volume production of such parts. With those higher volumes, variation management during product design becomes more critical. While manufacturing variations in CFRP materials occur on different scales, detecting and considering those on the meso (ply) scale becomes more important. Thus, the question arises whether such variations can be detected with standardized testing methods. In this study, artificial fiber misalignment has been introduced into the outer plies of standardized tensile specimens to explore the influence of such variations on the mechanical properties. A simulation model was developed to identify these variations and the test results were used to calibrate and optimize the material parameters of the simulation model. The effects of the artificially induced variation were distinguishable in the test data as well as in the simulation models. Furthermore, the simulation models showed good agreement with the experimental data, which leads to the conclusion that the utilized measuring techniques are well suited to characterize the fiber misalignment. The developed simulation models can be used to investigate the effects of fiber misalignment within the product development process without the need for physical testing. Full article
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17 pages, 11404 KiB  
Article
In-Plane Mechanical Characterization of a Kevlar® Composite
by Rene Alejandro Canceco de la Cruz, Caleb Carreño Gallardo, Alberto Diaz Diaz, Luis Adrian Zuñiga Aviles, Gabriel Plascencia Barrera and Jose Martin Herrera Ramirez
Fibers 2024, 12(5), 38; https://doi.org/10.3390/fib12050038 - 25 Apr 2024
Viewed by 1396
Abstract
Polymer-based composites are widely used in the automotive, security, aeronautical and space industries, to mention a few. This is because of their good mechanical properties, which are similar to those of metals but with the attraction of being lightweight. Kevlar® is extensively [...] Read more.
Polymer-based composites are widely used in the automotive, security, aeronautical and space industries, to mention a few. This is because of their good mechanical properties, which are similar to those of metals but with the attraction of being lightweight. Kevlar® is extensively used as a reinforcement in the security industry owing to its good ballistic properties. This investigation presents a mechanical characterization based on in-plane quasi-static tensile testing of Kevlar® 29/phenolic resin with a polyvinyl butyral composite using a universal testing system. The methodology developed for the preparation of the coupons is based on pressure, temperature and time. As a result of this work, elastic moduli (EL and ET), Poisson’s ratio (νLT), shear modulus (GLT) and strengths (XT, YT, S) were obtained. It is worth mentioning that there is scarce or no characterization of this material in the literature, and those studies that do characterize it do not present the coupons’ thermoforming conditions or the reasons for the coupons’ dimensions (width, length and thickness). Full article
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