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Polymers
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Mechanics of Polymer Composites
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Mechanics of Polymer Composites (Closed)

A topical collection in Polymers (ISSN 2073-4360). This collection belongs to the section "Polymer Analysis and Characterization".

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Editors

Dr. Seyed Saeid Rahimian Koloor

E-Mail Website
Collection Editor
Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec (TUL), Studentska 2, 461 17 Liberec, Czech Republic
Interests: solid mechanics (mathematical-physical modeling, simulation and experimentation); advanced composites; continuum mechanics; fatigue; fracture and damage mechanics; computational solid mechanics; design and analysis of materials and structures
Special Issues, Collections and Topics in MDPI journals
Dr. Michal Petrů

E-Mail Website
Collection Editor
Department of Machinery Construction, Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Technical University of Liberec, Studentská 1402/2, 46117 Liberec 1, Czech Republic
Interests: materials characterization; modeling; optimization; composites; machine design; machine learning
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Majid Reza Ayatollahi

E-Mail Website
Collection Editor
Center of Excellence in Experimental Solid Mechanics and Dynamics, School of Mechanical Engineering, Iran University of Science and Technology, Tehran 13114-16846, Iran
Interests: fracture mechanics; computational solid mechanics; experimental solid mechanics
Special Issues, Collections and Topics in MDPI journals

Topical Collection Information

Dear Researchers, 

Polymer and polymer-based composites have become one of the advanced technological materials with excellent chemical, physical and mechanical properties that are widely used in the manufacturing of structures in aerospace, automotive, marine, oil and gas, and energy industries. These materials continue to play important rules in the growth of new applications in markets such as transportation, infrastructure, construction, sports, etc. Therefore, new developments in the mechanics of polymers and polymer composite materials and structures, including manufacturing, design, and analysis of polymer composites, have been the goal of many research projects in academic societies and industrial sectors.

This topical collection on the mechanics of polymer composites promotes and contributes to the new developments and findings related to engineering, design, and examination of polymers and polymer composites at material and structural levels. It covers new topics in the development of new materials, manufacturing science, characterization, mathematical modelling, physical behavior, computational science, experimental solid mechanics, structural design, etc., at different nano-to-macro and structural scales. The aim and scope of the topical collection includes:

  • Development of new materials: thermoplastic, thermoset, FGM, FRP composites, FML, coating, etc.
  • Manufacturing science: additive manufacturing, synthesis, molding, forming, etc.
  • Characterization: mechanical, thermal, physical, etc.
  • Mathematical modelling: elastic, hyperelastic, viscoelastic, plastic, damage, failure, fatigue, etc.
  • Computational solid mechanics: finite element method, finite difference, peridynamics, real-time simulation, etc.
  • Novel testing methods: static, monotonic, dynamic, impact, cyclic, creep, etc.
  • Experimental solid mechanics in material characterization, determination of structural response, testing of complex structures, experimental stress analysis, etc.
  • Design: micro-systems, material level, structures and assemblies, super-structures, etc.
  • Physical behavior: moisture absorption, erosive/corrosive environmental effect, aging and long-term performance, etc.
  • New Sciences: nanomechanics, micromechanics, photomechanics, repair mechanics, recycling technology, etc.
  • New applications: aerospace, automotive, robotics, marine, energy, etc. 

Authors are welcome to submit their latest research and findings in the form of original research articles or reviews/mini reviews on the above-mentioned topics.

Dr. Seyed Saeid Rahimian Koloor
Dr. Michal Petrů
Prof. Dr. Majid Reza Ayatollahi
Collection 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 collection 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
  • new polymer-based materials
  • manufacturing science
  • characterization
  • mathematical modelling
  • physical behavior
  • computational solid mechanics
  • novel experimental methods
  • new applications

Published Papers (5 papers)

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2024

Jump to: 2023, 2022

19 pages, 4591 KiB  
Article
An Anisotropic Damage-Plasticity Constitutive Model of Continuous Fiber-Reinforced Polymers
by Siyuan Chen and Liang Li
Polymers 2024, 16(3), 334; https://doi.org/10.3390/polym16030334 - 25 Jan 2024
Cited by 1 | Viewed by 646
Abstract
Accurate structural analyses of continuous fiber-reinforced polymers (FRPs) are imperative for diverse engineering applications, demanding efficient material constitutive models. Nonetheless, the constitutive modeling of FRPs is complicated by the nonlinear behavior resulting from internal damages and the inherent plasticity. Consequently, this study presents [...] Read more.
Accurate structural analyses of continuous fiber-reinforced polymers (FRPs) are imperative for diverse engineering applications, demanding efficient material constitutive models. Nonetheless, the constitutive modeling of FRPs is complicated by the nonlinear behavior resulting from internal damages and the inherent plasticity. Consequently, this study presents an innovative anisotropic constitutive model for FRPs, designed to adeptly capture both the damage evolution and plasticity. All requisite parameters can be easily obtained through fundamental mechanical tests, rendering the model practical and user-friendly. The model utilizes the three-dimensional Puck criteria to determine damages, initiating the evolution process through a combination of continuum damage mechanics and linear stiffness attenuation methods. This evolution is coupled with a one-parameter plastic model. Subsequently, the numerical implementation method, integrated into ANSYS, is detailed. This emphasizes the Cauchy stress and consistent tangent stiffness solution strategy. Finally, the effectiveness of the developed model is demonstrated through comprehensive verification, encompassing existing biaxial tension and open-hole-tension tests conducted on carbon and glass FRP laminates. The simulation results exhibit a remarkable correspondence with the experimental data, validating the reliability and accuracy of the proposed model. Full article
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2023

Jump to: 2024, 2022

17 pages, 4378 KiB  
Article
A Fatigue Model to Predict Interlaminar Damage of FRP Composite Laminates Subjected to Mode I Load
by Safdar Ali Khan, Seyed Saeid Rahimian Koloor, Wong King Jye, Geralt Siebert and Mohd Nasir Tamin
Polymers 2023, 15(3), 527; https://doi.org/10.3390/polym15030527 - 19 Jan 2023
Cited by 1 | Viewed by 1498
Abstract
In fiber-reinforced polymer (FRP) composite laminate structures operating under fluctuating stresses, interface delamination is seen as one of the significant damage mechanisms. The constant degradation of their relatively low interlaminar strength and stiffness are the primary reasons for delamination. This study develops an [...] Read more.
In fiber-reinforced polymer (FRP) composite laminate structures operating under fluctuating stresses, interface delamination is seen as one of the significant damage mechanisms. The constant degradation of their relatively low interlaminar strength and stiffness are the primary reasons for delamination. This study develops an interlaminar fatigue damage model to quantify the mechanics of the damage process and address the reliability of composite structures. The model considers the failure process in two stages: (1) damage due to degradation of interlaminar elastic properties, and (2) damage due to dissipation of fracture energy through the damage evolution process. The model is examined for a case study of mode I fatigue loading of a carbon-fiber-reinforced polymer (CFRP) composite laminate. The results show that the interlaminar normal stress is confined to the crack front region, with tensile stress peaks at 70% of the interlaminar strength. Furthermore, a stable interface crack growth is predicted initially, followed by a sudden crack “jump” at 14,000 cycles. The simulation results are compared with the experimental data, with very good agreement, showing a successful validation of the fatigue model. Full article
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2022

Jump to: 2024, 2023

30 pages, 2732 KiB  
Review
Lightweight Glass Fiber-Reinforced Polymer Composite for Automotive Bumper Applications: A Review
by Hossein Mohammadi, Zaini Ahmad, Saiful Amri Mazlan, Mohd Aidy Faizal Johari, Geralt Siebert, Michal Petrů and Seyed Saeid Rahimian Koloor
Polymers 2023, 15(1), 193; https://doi.org/10.3390/polym15010193 - 30 Dec 2022
Cited by 23 | Viewed by 7645
Abstract
The enhancement of fuel economy and the emission of greenhouse gases are the key growing challenges around the globe that drive automobile manufacturers to produce lightweight vehicles. Additionally, the reduction in the weight of the vehicle could contribute to its recyclability and performance [...] Read more.
The enhancement of fuel economy and the emission of greenhouse gases are the key growing challenges around the globe that drive automobile manufacturers to produce lightweight vehicles. Additionally, the reduction in the weight of the vehicle could contribute to its recyclability and performance (for example crashworthiness and impact resistance). One of the strategies is to develop high-performance lightweight materials by the replacement of conventional materials such as steel and cast iron with lightweight materials. The lightweight composite which is commonly referred to as fiber-reinforced plastics (FRP) composite is one of the lightweight materials to achieve fuel efficiency and the reduction of CO2 emission. However, the damage of FRP composite under impact loading is one of the critical factors which affects its structural application. The bumper beam plays a key role in bearing sudden impact during a collision. Polymer composite materials have been abundantly used in a variety of applications such as transportation industries. The main thrust of the present paper deals with the use of high-strength glass fibers as the reinforcing member in the polymer composite to develop a car bumper beam. The mechanical performance and manufacturing techniques are discussed. Based on the literature studies, glass fiber-reinforced composite (GRP) provides more promise in the automotive industry compared to conventional materials such as car bumper beams. Full article
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18 pages, 6961 KiB  
Article
On Comparison of Heat Treated and Non-Heat-Treated LOM Manufactured Sample for Poly(lactic)acid: Mechanical and Morphological View Point
by I. Singh, S. Kumar, S. S. R. Koloor, D. Kumar, M. Y. Yahya and J. Mago
Polymers 2022, 14(23), 5098; https://doi.org/10.3390/polym14235098 - 24 Nov 2022
Cited by 6 | Viewed by 1655
Abstract
This work reports the comparison of heat-treated and non-heat-treated laminated object-manufactured (LOM) 3D-printed specimens from mechanical and morphological viewpoints. The study suggests that heat treatment of the FDM-printed specimen may have a significant impact on the material characteristics of the polymer. The work [...] Read more.
This work reports the comparison of heat-treated and non-heat-treated laminated object-manufactured (LOM) 3D-printed specimens from mechanical and morphological viewpoints. The study suggests that heat treatment of the FDM-printed specimen may have a significant impact on the material characteristics of the polymer. The work has been performed at two stages for the characterization of (a) non-heat-treated samples and (b) heat-treated samples. The results for stage 1 (non-heat-treated samples) suggest that the infill density: 70%, infill pattern: honeycomb, and six number of discs in a single LOM-manufactured sample is the optimized condition with a compression strength of 42.47 MPa. The heat treatment analysis at stage 2 suggests that a high temperature: 65 °C, low time interval: 10 min, works equally well as the low temperature: 55 °C, high time interval: 30 min. The post-heat treatment near Tg (65 °C) for a time interval of 10 min improved the compressive strength by 105.42%. Full article
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15 pages, 5555 KiB  
Article
Crashworthiness Assessment of Carbon/Glass Epoxy Hybrid Composite Tubes Subjected to Axial Loads
by Ali Farokhi Nejad, Seyed Saeid Rahimian Koloor, Mohd Luqman Hakim Arifin, Ali Shafiei, Shukur Abu Hassan and Mohd Yazid Yahya
Polymers 2022, 14(19), 4083; https://doi.org/10.3390/polym14194083 - 29 Sep 2022
Cited by 3 | Viewed by 1784
Abstract
The crashworthiness of composite tubes is widely examined for various types of FRP composites. However, the use of hybrid composites potentially enhances the material characteristics under impact loading. In this regard, this study used a combination of unidirectional glass–carbon fibre reinforced epoxy resin [...] Read more.
The crashworthiness of composite tubes is widely examined for various types of FRP composites. However, the use of hybrid composites potentially enhances the material characteristics under impact loading. In this regard, this study used a combination of unidirectional glass–carbon fibre reinforced epoxy resin as the hybrid composite tube fabricated by the pultrusion method. Five tubes with different length aspect ratios were fabricated and tested, in which the results demonstrate “how structural energy absorption affects by increasing the length of tubes”. Crash force efficiency was used as the criterion to show that the selected L/D are acceptable of crash resistance with 95% efficiency. Different chamfering shapes as the trigger mechanism were applied to the tubes and the triggering effect was examined to understand the impact capacity of different tubes. A finite element model was developed to evaluate different crashworthiness indicators of the test. The results were validated through a good agreement between experimental and numerical simulations. The experimental and numerical results show that hybrid glass/carbon tubes accomplish an average 25.34 kJ/kg specific energy absorption, average 1.43 kJ energy absorption, average 32.43 kN maximum peak load, and average 96.67% crash force efficiency under quasi-static axial loading. The results show that selecting the optimum trigger mechanism causes progressive collapse and increases the specific energy absorption by more than 35%. Full article
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