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Polymers
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Multiscale Modelling of Fiber Reinforced Polymer Composites
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Multiscale Modelling of Fiber Reinforced Polymer Composites

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

Deadline for manuscript submissions: closed (30 August 2023) | Viewed by 7693

Special Issue Editor

Dr. Ruben Sevenois

E-Mail Website
Guest Editor
Department of Materials, Textiles and Chemical Engineering, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 46, 9052 Zwijnaarde, Belgium
Interests: fibre-reinforced polymer composites; modelling; testing; multiscale; mechanical; thermal; strength; permanent deformation; plasticity; damage; thermomechanical

Special Issue Information

Dear Colleagues,

The Special Issue is aimed at manuscripts concerning the multiscale modelling of fibre-reinforced polymer composites. The scope is the prediction of macroscopic thermomechanical properties and the assessment of microstructural phenomena using multiscale modelling techniques. All mechanical phenomena which occur in FRP are considered. Among them are stiffness, strength, the (microstructural) evolution of damage and permanent strain, and their dependency on temperature, humidity, strain rate or crystalline morphology; all forms of FRP; and thermoset, thermoplastic, or vitrimer matrix material reinforced with short or continuous fibres in random, unidirectional or woven geometrical arrangement. Authors are encouraged to validate their model predictions with experimental results.

Dr. Ruben Sevenois
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

  • polymers
  • polymer composites
  • modelling
  • multiscale
  • fibre-reinforced polymers
  • mechanical
  • thermal
  • strength
  • permanent deformation
  • plasticity
  • damage
  • thermomechanical

Published Papers (4 papers)

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Research

24 pages, 16941 KiB  
Article
Characterizing Pure Polymers under High Speed Compression for the Micromechanical Prediction of Unidirectional Composites
by Pei Hao, Siebe W. F. Spronk, Ruben D. B. Sevenois, Wim Van Paepegem and Francisco A. Gilabert
Polymers 2023, 15(5), 1262; https://doi.org/10.3390/polym15051262 - 2 Mar 2023
Cited by 3 | Viewed by 1983
Abstract
The nonlinear behaviour of fibre-reinforced polymer composites (FRPC) in transverse loading is mainly induced by the constituent polymer matrix. The thermoset and thermoplastic matrices are typically rate- and temperature-dependent, complicating the dynamic material characterization process. Under dynamic compression, the microstructure of the FRPC [...] Read more.
The nonlinear behaviour of fibre-reinforced polymer composites (FRPC) in transverse loading is mainly induced by the constituent polymer matrix. The thermoset and thermoplastic matrices are typically rate- and temperature-dependent, complicating the dynamic material characterization process. Under dynamic compression, the microstructure of the FRPC develops local strains and local strain rates whose values can be much higher than those applied at macroscopic level. The correlation between the local (microscopic) values and the measurable (macroscopic) ones still present challenges when applying the strain rate in the range 10−3–103 s−1. This paper presents an in-house uniaxial compression test setup to provide robust stress–strain measurements applying strain rates up to 100 s−1. A semi-crystalline thermoplastic polyetheretherketone (PEEK) and a toughened thermoset epoxy PR520 are assessed and characterized. The thermomechanical response of the polymers is further modelled using an advanced glassy polymer model, naturally capturing the isothermal to adiabatic transition. A micromechanical model of a unidirectional composite undergoing dynamic compression is developed by using both validated polymers as matrices reinforced by carbon fibres (CF) using Representative Volume Element (RVE) models. These RVEs are used to analyse the correlation between the micro- and macroscopic thermomechanical response of the CF/PR520 and CF/PEEK systems investigated at intermediate to high strain rates. Both systems experience an excessive strain localization with local plastic strain about 19% when a macroscopic strain of 3.5% is applied. The comparison of using a thermoplastic and a thermoset as a matrix in composites is discussed with regard to the rate-dependence, the interface debonding and the self-heating effect. Full article
(This article belongs to the Special Issue Multiscale Modelling of Fiber Reinforced Polymer Composites)
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27 pages, 7632 KiB  
Article
Multiscale Progressive Failure Analysis of 3D Woven Composites
by Trenton M. Ricks, Evan J. Pineda, Brett A. Bednarcyk, Linda S. McCorkle, Sandi G. Miller, Pappu L. N. Murthy and Kenneth N. Segal
Polymers 2022, 14(20), 4340; https://doi.org/10.3390/polym14204340 - 15 Oct 2022
Cited by 7 | Viewed by 1902
Abstract
Application of three-dimensional (3D) woven composites is growing as an alternative to the use of ply-based composite materials. However, the design, analysis, modeling, and optimization of these materials is more challenging due to their complex and inherently multiscale geometries. Herein, a multiscale modeling [...] Read more.
Application of three-dimensional (3D) woven composites is growing as an alternative to the use of ply-based composite materials. However, the design, analysis, modeling, and optimization of these materials is more challenging due to their complex and inherently multiscale geometries. Herein, a multiscale modeling procedure, based on efficient, semi-analytical micromechanical theories rather than the traditional finite element approach, is presented and applied to a 3D woven carbon–epoxy composite. A crack-band progressive damage model was employed for the matrix constituent to capture the globally observed nonlinear response. Realistic microstructural dimensions and tow-fiber volume fractions were determined from detailed X-ray computed tomography (CT) and scanning electron microscopy data. Pre-existing binder-tow disbonds and weft-tow waviness, observed in X-ray CT scans of the composite, were also included in the model. The results were compared with experimental data for the in-plane tensile and shear behavior of the composite. The tensile predictions exhibited good correlations with the test data. While the model was able to capture the less brittle nature of the in-plane shear response, quantitative measures were underpredicted to some degree. Full article
(This article belongs to the Special Issue Multiscale Modelling of Fiber Reinforced Polymer Composites)
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12 pages, 1975 KiB  
Article
Failure Prediction of Notched Composites Using Multiscale Approach
by Young W. Kwon
Polymers 2022, 14(12), 2481; https://doi.org/10.3390/polym14122481 - 18 Jun 2022
Cited by 5 | Viewed by 1382
Abstract
This paper presents multiscale-based failure criteria to predict the failure of polymer composites with any shape of defect. The multiscale technique consists of bi-directional processes called upscaling and downscaling processes to link two different length scales. One is the microscale at the fiber [...] Read more.
This paper presents multiscale-based failure criteria to predict the failure of polymer composites with any shape of defect. The multiscale technique consists of bi-directional processes called upscaling and downscaling processes to link two different length scales. One is the microscale at the fiber and matrix material level, and the other is the macroscale at the homogenized composite material level. Failure criteria are applied to the microscale level such as micro-stresses and/or micro-strains occurring at the fiber and matrix material level. Recently proposed unified failure criteria are applied to the micro-stresses and/or micro-strains to predict failure at a notch. The new failure criteria have two parts, and they can be applied to any shape of defect. One is the stress or strain condition, and the other is the stress or strain gradient condition. For failure to occur, both conditions must be satisfied simultaneously. The failure criteria provide not only failure locations but also directions of failure propagation. Full article
(This article belongs to the Special Issue Multiscale Modelling of Fiber Reinforced Polymer Composites)
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15 pages, 3965 KiB  
Article
Numerical Study on the Effect of Matrix Self-Heating on the Thermo-Visco-Plastic Response of Continuous Fiber-Reinforced Polymers under Transverse Tensile Loading
by Ruben D. B. Sevenois, Pei Hao, Wim Van Paepegem and Francisco A. Gilabert
Polymers 2022, 14(10), 1941; https://doi.org/10.3390/polym14101941 - 10 May 2022
Cited by 4 | Viewed by 1536
Abstract
The recyclability and improved suitability for high-volume production make fiber-reinforced thermoplastic polymers (FRP) attractive alternatives for the current thermoset-based ones. However, while they are more ductile than their thermoset counterparts, their behavior is also more susceptible to environmental conditions such as humidity, temperature, [...] Read more.
The recyclability and improved suitability for high-volume production make fiber-reinforced thermoplastic polymers (FRP) attractive alternatives for the current thermoset-based ones. However, while they are more ductile than their thermoset counterparts, their behavior is also more susceptible to environmental conditions such as humidity, temperature, and strain rate. The latter can trigger self-heating and thermal softening effects. The role of matrix self-heating in FRP subjected to transverse loading is investigated using micromechanical modeling. Particularly, the effect of self-heating, strain rate and conductivity of the fiber-matrix interface is illustrated. It is shown that local heating of the matrix is dominant for the homogenized behavior of the material. Although the global homogenized temperature increase is limited, local thermal softening can induce premature failure. It is shown that the effect of thermal softening can be more prominent with increasing volume fraction, increasing strain rate, and lower interface conductivity. Full article
(This article belongs to the Special Issue Multiscale Modelling of Fiber Reinforced Polymer Composites)
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