Modal Parameters Estimation of Circular Plates Manufactured by FDM Technique Using Vibrometry: A Comparative Study DOI Creative Commons
Martin Hagara, Miroslav Pástor, Pavol Lengvarský

и другие.

Applied Sciences, Год журнала: 2024, Номер 14(22), С. 10609 - 10609

Опубликована: Ноя. 18, 2024

This paper presents a comparative study focused on modal parameters estimation of specimens manufactured by the FDM technique using fixed embedded vibrometer based laser Doppler principle and roving hammer-impact method. Part this is devoted to testing circular plate with honeycomb infill pattern while varying number excitation points (DOFs), analysis lines fast Fourier transformation (FFT), locations or numbers reference degrees freedom (REFs). Although these did not significantly affect values found for natural frequencies structure, there were changes in estimates mode shapes (affected low DOFs), height sharpness peaks CMIF functions (caused increased FFT lines), identified modes (influenced chosen location(s) REFs), respectively. Subsequently, authors compared results experimental analyses carried out under same conditions three plates honeycomb, star, concentric patterns made PLA. The confirm that star have higher stiffness than those patterns. damping ratios obtained each structure indicate strong response at near their frequencies.

Язык: Английский

Bioprinting and Intellectual Property: Challenges, Opportunities, and the Road Ahead DOI Creative Commons
Antreas Kantaros, Theodore Ganetsos, Florian Ion Tiberiu Petrescu

и другие.

Bioengineering, Год журнала: 2025, Номер 12(1), С. 76 - 76

Опубликована: Янв. 15, 2025

Bioprinting, an innovative combination of biotechnology and additive manufacturing, has emerged as a transformative technology in healthcare, enabling the fabrication functional tissues, organs, patient-specific implants. The implementation aforementioned, however, introduces unique intellectual property (IP) challenges that extend beyond conventional biotechnology. study explores three critical areas concern: IP protection for bioprinting hardware bioinks, ownership ethical management digital files derived from biological data, implications commercializing bioprinted tissues organs. Employing multidisciplinary approach, paper analyzes existing frameworks, highlights their limitations when applied to bioprinting, examines dilemmas, such human commodification innovations. Findings suggest current laws inadequately address complexities particularly managing intersection proprietary technologies considerations. underscores need adaptive legal frameworks balance innovation with equitable access sustainability. Recommendations include development tailored policies enhanced international collaboration harmonize protections across jurisdictions. This work aims provide comprehensive foundation stakeholders navigate rapidly evolving landscape IP.

Язык: Английский

Процитировано

9

Application of additive manufacturing in automobile industry: a mini review DOI Open Access
Jian Yang, Bo Li, Jian Liu

и другие.

Опубликована: Май 9, 2024

Automobile industry is recognized as one of the most influential sectors shaping global economies, societies, and individual lifestyles. Therefore, fierce competitions among different companies are continuously undergoing, innovations deserve special attention to improve competitiveness. In past several years, additive manufacturing (AM) emerging an innovative technology in applications automobile with significant advantages over traditional techniques. As a result, increasing has been attracted combining AM development industry. Currently, many players optimizing their industrial layout by incorporating techniques, meanwhile, research progresses have achieved meet market demand. This article aims at presenting timely review conclude recent advances application techniques industry, focusing on available printable materials, applications. The future opportunities challenges also outlooked. Hopefully, this work can be useful related researchers, well game field.

Язык: Английский

Процитировано

10

The Evolution of Thermoplastic Raw Materials in High-Speed FFF/FDM 3D Printing Era: Challenges and Opportunities DOI Open Access
Antreas Kantaros,

Meropi Katsantoni,

Theodore Ganetsos

и другие.

Materials, Год журнала: 2025, Номер 18(6), С. 1220 - 1220

Опубликована: Март 9, 2025

The evolution of thermoplastic materials has played a critical role in advancing high-speed Fused Filament Fabrication (FFF) and Deposition Modeling (FDM) 3D printing technologies. This study explores the performance challenges associated with next-generation thermoplastics specifically designed for printing, such as PLA, ABS, PETG, comparison to conventional materials. A systematic analysis was conducted evaluate key parameters, including mechanical properties, layer adhesion, surface finish, dimensional accuracy, under varying conditions. results reveal that thermoplastics, when coupled advanced hardware optimized motion control systems, achieve up 70% reduction time without significant trade-offs integrity or precision. Additionally, identifies challenges, increased thermal stresses, warping, need precise cooling strategies, which can impact material at elevated speeds. Opportunities future development are also discussed, design novel polymer formulations innovations further enhance reliability scalability FFF/FDM printing. work underscores potential adopting era highlights interplay between science engineering achieving manufacturing capabilities.

Язык: Английский

Процитировано

1

Harnessing the Potential of Natural Composites in Biomedical 3D Printing DOI Open Access
Farah Syazwani Shahar, Mohamed Thariq Hameed Sultan, Rafał Grzejda

и другие.

Materials, Год журнала: 2024, Номер 17(24), С. 6045 - 6045

Опубликована: Дек. 10, 2024

Natural composites are emerging as promising alternative materials for 3D printing in biomedical applications due to their biocompatibility, sustainability, and unique mechanical properties. The use of natural offers several advantages, including reduced environmental impact, enhanced biodegradability, improved tissue compatibility. These can be processed into filaments or resins suitable various techniques, such fused deposition modeling (FDM). also exhibit inherent antibacterial properties, making them particularly engineering, drug delivery systems, implants. This review explores the potential utilizing additive manufacturing purposes, discussing historical development techniques; types methods; optimization material compatibility, printability, properties fully realize using fibers applications.

Язык: Английский

Процитировано

4

Smart Infrastructure and Additive Manufacturing: Synergies, Advantages, and Limitations DOI Creative Commons
Antreas Kantaros, Paraskevi Zacharia, Christos Drosos

и другие.

Applied Sciences, Год журнала: 2025, Номер 15(7), С. 3719 - 3719

Опубликована: Март 28, 2025

The integration of 3D printing with smart infrastructure presents a transformative opportunity in urban planning, construction, and engineering, enhancing efficiency, flexibility, sustainability. By leveraging additive manufacturing alongside digitalization, artificial intelligence (AI), the Internet Things (IoT), this technology enables creation customized, lightweight, sensor-embedded structures. This work analyzes both advantages challenges applying infrastructure, focusing on material optimization, rapid prototyping, automated fabrication, which significantly reduce construction time, labor costs, waste. Applications such as 3D-printed bridges, modular housing, IoT-integrated furniture exhibit its potential contributing towards resilient resource-efficient cities. However, despite these benefits, significant hinder large-scale adoption. Issues scalability, particularly fabrication large load-bearing structures, remain unresolved, requiring advancements high-speed techniques, reinforcement strategies, hybrid methods. Furthermore, regulatory uncertainties absence standardized guidelines create barriers to implementation. lack comprehensive building codes, certification protocols, quality assurance measures for structures limits their widespread acceptance mainstream construction. Overcoming limitations necessitates research into AI-driven process multi-material printing, international standardization efforts. assisting overcoming challenges, has redefine development, making more adaptive, cost-effective, environmentally sustainable. provides critical evaluation current capabilities achieving full-scale implementation compliance.

Язык: Английский

Процитировано

0

Valorization of Polymethylmethacrylate Scrap Reinforced with Nano Carbon Black with Optimized Ratio in Extrusion-Based Additive Manufacturing DOI Open Access
Nikolaos Michailidis, Nectarios Vidakis, Constantine David

и другие.

Polymers, Год журнала: 2025, Номер 17(10), С. 1383 - 1383

Опубликована: Май 17, 2025

To promote environmental sustainability, this research investigated the potential of utilizing recycled polymethylmethacrylate (PMMA) as raw material in extrusion (MEX) additive manufacturing (AM). enhance its mechanical response, carbon black (CB) was employed filler nanocomposite formation. Filament mixture at different concentrations produced printable feedstocks for MEX AM. Rheological analysis (viscosity and flow rate) showed that CB introduction to matrix beneficial consistent layer deposition, while differential scanning calorimetry thermogravimetric analyses verified thermal stability nanocomposites during processing. Mechanical properties were optimized, with increases modulus (27.8% 25.8%, respectively, tensile bending loadings) strength optimal loadings. Dynamic revealed viscoelastic response nanocomposites. Raman energy dispersive spectroscopy provided element-related insights. Surface morphology parts structure observed employing electron microscopy micro-computed tomography, revealing a positive impact on AM due presence The 4 wt.% content optimum one. This pioneers development new sustainable filaments highlights next-generation MEX-based

Язык: Английский

Процитировано

0

Titanium Additive Manufacturing with Powder Bed Fusion: A Bibliometric Perspective DOI Creative Commons
Antonio del Bosque, Pablo Fernández‐Arias, Diego Vergara

и другие.

Applied Sciences, Год журнала: 2024, Номер 14(22), С. 10543 - 10543

Опубликована: Ноя. 15, 2024

Titanium additive manufacturing using powder bed fusion technologies has seen notable growth since 2015, particularly in high-performance sectors such as aerospace, biomedical, and automotive industries. This study focuses on key areas like metallic manipulation, laser optimization, process control, with selective melting emerging the dominant technique over electron beam melting. Advancements materials systems have been crucial to improving efficiency quality of process, enhancing microstructure porosity control. The bibliometric analysis reveals significant global interest, driven mainly by collaborations among institutions Germany, United States, China, where further international cooperation is required scale titanium manufacturing. However, additional research essential address challenges scalability, sustainability, post-processing, thus expanding applications PBF technology across In conclusion, processing via poised make substantial contributions future manufacturing, provided current are addressed through innovation enhanced collaboration.

Язык: Английский

Процитировано

2

Effect of Powder Recycling on the Surface and Selected Technological Properties of M300 Maraging Steel Produced via the SLM Method DOI Creative Commons

Abdesselam Mechali,

Josef Hlinka,

Michal Kresta

и другие.

Journal of Manufacturing and Materials Processing, Год журнала: 2024, Номер 8(6), С. 267 - 267

Опубликована: Ноя. 27, 2024

This study delves into selective laser melting (SLM). By using M300 steel in virgin and recycled powder form (after 20 cycles), with the aim of reducing cost printing for practical application maraging steel, a comprehensive comparison between two types was evaluated. The powder’s morphology analyzed scanning electron microscopy (SEM) backscattered electrons (BSE). particles were seen to have spherical shape, notable number satellites attached their surfaces. particle size distribution (PSD) examined ranged from 10 90 µm both powders. In addition, porosity exhibited an average value 0.07% 0.10% powder. microstructure examined. Additionally, surface wettability tested, it display wetting behavior powder, while blackened surfaces showed higher angle than untreated (hydrophobic). 2D roughness measurements that had no significant difference (Ra = 5.33 µm, Rz 24.17 µm) before blackening 5.48 24.07 after blackening. Corrosion tests proved did not affect corrosion properties material, caused partial samples, regardless used

Язык: Английский

Процитировано

1

About the Aged Degradation of the Materials Used for Medium-Voltage Distributors DOI Creative Commons
Gabriel Nicolae Popa,

Dimitar Aleksiev Nikolov,

Corina Maria Diniş

и другие.

Energies, Год журнала: 2024, Номер 17(14), С. 3418 - 3418

Опубликована: Июль 11, 2024

The medium-voltage components in the ignition installations for gasoline engines contain electroinsulating materials that lose their properties over time. purpose of this paper is to measure and analyze insulation resistance, dielectric absorption ratio polarization index (three types materials) used distributors, several operating periods, automotive installations. Experiments were conducted with old (operation tens thousands km, some surfaces have been cleaned) new a megohmmeter was measure, time, resistance between central terminal output terminals at different test voltages. distributors depends on use: ones, they values GΩ (e.g., up 100 GΩ) and, order TΩ 4–7 TΩ). more are used, same distributor, there greater differences measurements made average (87% respectively, 2% ones). For or less higher obtained (1.26–1.27; 0.91–0.95) (1.15–1.25; 0.96–1.15). results show importance volume material compared surface insignificant improvement when cleaning internal external distributors.

Язык: Английский

Процитировано

0

Modal Parameters Estimation of Circular Plates Manufactured by FDM Technique Using Vibrometry: A Comparative Study DOI Creative Commons
Martin Hagara, Miroslav Pástor, Pavol Lengvarský

и другие.

Applied Sciences, Год журнала: 2024, Номер 14(22), С. 10609 - 10609

Опубликована: Ноя. 18, 2024

This paper presents a comparative study focused on modal parameters estimation of specimens manufactured by the FDM technique using fixed embedded vibrometer based laser Doppler principle and roving hammer-impact method. Part this is devoted to testing circular plate with honeycomb infill pattern while varying number excitation points (DOFs), analysis lines fast Fourier transformation (FFT), locations or numbers reference degrees freedom (REFs). Although these did not significantly affect values found for natural frequencies structure, there were changes in estimates mode shapes (affected low DOFs), height sharpness peaks CMIF functions (caused increased FFT lines), identified modes (influenced chosen location(s) REFs), respectively. Subsequently, authors compared results experimental analyses carried out under same conditions three plates honeycomb, star, concentric patterns made PLA. The confirm that star have higher stiffness than those patterns. damping ratios obtained each structure indicate strong response at near their frequencies.

Язык: Английский

Процитировано

0