Innovative and Sustainable Advances in Polymer Composites for Additive Manufacturing: Processing, Microstructure, Machining, and Mechanical Properties

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Guest Editor
School of Computing & Engineering Technology, Robert Gordon University, Aberdeen AB10 7QB, UK
Interests: polymer composites; MXenes; graphene; additive manufacturing
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Special Issue Information

Dear Colleagues,

Additive manufacturing (AM) has revolutionised material fabrication, enabling the production of complex geometries and customisable designs with reduced waste. Polymer composites, with their versatile properties, have emerged as a focal point in AM research and applications. This Special Issue aims to explore innovative approaches in the processing, characterisation, simulation, machining, and optimisation of polymer composites tailored for additive manufacturing. It seeks to bring together cutting-edge studies that address the relationships between processing techniques, microstructure development, mechanical performance, machining behaviour, and life cycle assessment (LCA). Emphasis will be placed on novel methodologies, material formulations, and insights into enhancing the sustainability and functionality of polymer composites in AM.

We are pleased to invite you to contribute to a Special Issue titled “Innovative and Sustainable Approaches to Polymer Composites in Additive Manufacturing: Processing, Microstructure, and Mechanical Properties”. This Special Issue aims to bring together the latest research and advancements in polymer composites tailored for additive manufacturing (AM).

The focus will be on exploring novel methodologies in processing, microstructure–property relationships, simulation and modelling, machining behaviour, mechanical performance, and sustainability. Contributions addressing life cycle assessment (LCA), material formulations, and composite reinforcement innovations are particularly welcome.

We invite original research articles, reviews, and case studies that advance the understanding of polymer composites in AM, including their machining characteristics and potential applications. This Special Issue offers an excellent opportunity to share insights and collaborate within the rapidly evolving field of additive manufacturing.

We look forward to your valuable contributions.

Dr. Mohd Shahneel Saharudin
Guest Editor

Manuscript Submission Information

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Keywords

  • additive manufacturing (3D printing)
  • polymer composites
  • processing techniques
  • microstructure–property relationships
  • mechanical properties
  • simulation and modelling
  • life cycle assessment (LCA)
  • sustainable manufacturing
  • advanced material formulations
  • composite reinforcement innovation

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Published Papers (3 papers)

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Editorial

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9 pages, 1092 KiB  
Editorial
Innovative and Sustainable Advances in Polymer Composites for Additive Manufacturing: Processing, Microstructure, and Mechanical Properties
by Mohd Shahneel Saharudin, Asif Ullah and Muhammad Younas
J. Manuf. Mater. Process. 2025, 9(2), 51; https://doi.org/10.3390/jmmp9020051 - 6 Feb 2025
Viewed by 1281
Abstract
Additive manufacturing (AM) has revolutionised the production of customised components across industries such as the aerospace, automotive, healthcare, electronics, and renewable energy industries. Offering unmatched design freedom, reduced time-to-market, and minimised material waste, AM enables the fabrication of high-quality, customised products with greater [...] Read more.
Additive manufacturing (AM) has revolutionised the production of customised components across industries such as the aerospace, automotive, healthcare, electronics, and renewable energy industries. Offering unmatched design freedom, reduced time-to-market, and minimised material waste, AM enables the fabrication of high-quality, customised products with greater sustainability compared to traditional methods like machining and injection moulding. Additionally, AM reduces energy consumption, resource requirements, and CO2 emissions throughout a material’s lifecycle, aligning with global sustainability goals. This paper highlights insights into the sustainability of AM polymers, comparing bio-based and traditional polymers. Bio-based polymers exhibit lower carbon footprints during production but may face challenges in durability and mechanical performance. Conversely, traditional polymers, while more robust, require higher energy inputs and contribute to greater carbon emissions. Polymer composites tailored for AM further enhance material properties and support the development of innovative, eco-friendly solutions. This Special Issue brings together cutting-edge research on polymer composites in AM, focusing on processing techniques, microstructure–property relationships, mechanical performance, and sustainable manufacturing practices. These advancements underscore AM’s transformative potential to deliver versatile, high-performance solutions across diverse industries. Full article
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Research

Jump to: Editorial

20 pages, 5173 KiB  
Article
Scarf Adhesive Bonding of 3D-Printed Polymer Structures
by Tiago F. R. Ribeiro, Raul D. S. G. Campilho, Ricardo F. R. Pinto and Ricardo J. B. Rocha
J. Manuf. Mater. Process. 2025, 9(4), 115; https://doi.org/10.3390/jmmp9040115 - 2 Apr 2025
Viewed by 295
Abstract
Additive manufacturing (AM) has swiftly emerged as a substitute for conventional methods such as machining and injection moulding. Its appeal is attributed to accelerated prototyping, improved sustainability, and the capacity to fabricate intricate shapes. Nonetheless, the size constraints of additive manufacturing components require [...] Read more.
Additive manufacturing (AM) has swiftly emerged as a substitute for conventional methods such as machining and injection moulding. Its appeal is attributed to accelerated prototyping, improved sustainability, and the capacity to fabricate intricate shapes. Nonetheless, the size constraints of additive manufacturing components require the assembly of smaller 3D-printed elements to create larger structures. This study investigates the tensile properties of scarf joints (SJs) created from several polymers, including ABS, PETG, and PLA, adhered with Araldite® 2015 and Sikaforce® 7752 adhesives. The characteristics of the adherends were assessed prior to examining the adhesive efficacy in the SJ configuration. Experimental evaluations quantified failure modes, joint strength, assembly stiffness, and energy at failure, comparing findings with predictions from a cohesive zone model (CZM). The objective was to determine the ideal combination of materials and adhesives for enhanced joint performance. Results indicated that joint performance is greatly affected by the adherend material, adhesive selection, and scarf angle. PLA and Araldite® 2015 typically exhibited optimal strength and stiffness, but Sikaforce® 7752 demonstrated enhanced energy absorption for extended bonding lengths. Full article
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23 pages, 11856 KiB  
Article
Optimizing Process Parameters to Enhance Mechanical Properties of 3D-Printed Fiberglass-Reinforced ONYX Polymer
by Naumaan Shafique, Zarak Khan, Mushtaq Khan, Muhammad Younas and Mohd Shahneel Saharudin
J. Manuf. Mater. Process. 2025, 9(4), 108; https://doi.org/10.3390/jmmp9040108 - 26 Mar 2025
Viewed by 340
Abstract
Fused Deposition Modeling (FDM) is widely used for custom manufacturing but has limitations in strength for load-bearing applications. This study explores the optimization of mechanical properties for lightweight, cost-effective components using continuous fiber reinforcement. ONYX polymer, reinforced with continuous fiberglass, was printed using [...] Read more.
Fused Deposition Modeling (FDM) is widely used for custom manufacturing but has limitations in strength for load-bearing applications. This study explores the optimization of mechanical properties for lightweight, cost-effective components using continuous fiber reinforcement. ONYX polymer, reinforced with continuous fiberglass, was printed using the Markforged® Mark Two dual nozzle 3D printer. A Design of Experimentation (DoE) based on a Taguchi L9 array was used, varying fiberglass content (10%, 20%, 30%), infill densities (30%, 40%, 50%), and pattern types (hexagonal, rectangular, Triangular). The results show that increasing fiberglass content, infill density, and using a rectangular pattern enhanced mechanical properties, with a 30% fiberglass addition achieving a 4.743-fold increase in Izod impact energy. The highest mechanical performance was obtained with 30% fiberglass, 50% infill density, and a rectangular pattern, yielding an impact energy of 1576.778 J/m, compressive strength of 29.486 MPa, and Shore D hardness of 68.135 HD. Full article
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