1
|
Putra NE, Moosabeiki V, Leeflang MA, Zhou J, Zadpoor AA. Biodegradation-affected fatigue behavior of extrusion-based additively manufactured porous iron-manganese scaffolds. Acta Biomater 2024; 178:340-351. [PMID: 38395100 DOI: 10.1016/j.actbio.2024.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/13/2024] [Accepted: 02/14/2024] [Indexed: 02/25/2024]
Abstract
Additively manufactured (AM) biodegradable porous iron-manganese (FeMn) alloys have recently been developed as promising bone-substituting biomaterials. However, their corrosion fatigue behavior has not yet been studied. Here, we present the first study on the corrosion fatigue behavior of an extrusion-based AM porous Fe35Mn alloy under cyclic loading in air and in the revised simulated body fluid (r-SBF), including the fatigue crack morphology and distribution in the porous structure. We hypothesized that the fatigue behavior of the architected AM Fe35Mn alloy would be strongly affected by the simultaneous biodegradation process. We defined the endurance limit as the maximum stress at which the scaffolds could undergo 3 million loading cycles without failure. The endurance limit of the scaffolds was determined to be 90 % of their yield strength in air, but only 60 % in r-SBF. No notable crack formation in the specimens tested in air was observed even after loading up to 90 % of their yield strength. As for the specimens tested in r-SBF, however, cracks formed in the specimens subjected to loads exceeding 60 % of their yield strength appeared to initiate on the periphery and propagate toward the internal struts. Altogether, the results show that the extrusion-based AM porous Fe35Mn alloy is capable of tolerating up to 60 % of its yield strength for up to 3 million cycles, which corresponds to 1.5 years of use of load-bearing implants subjected to repetitive gait cycles. The fatigue performance of the alloy thus further enhances its potential for trabecular bone substitution subjected to cyclic compressive loading. STATEMENT OF SIGNIFICANCE: Fatigue behavior of extrusion-based AM porous Fe35Mn alloy scaffolds in air and revised simulated body fluid was studied. The Fe35Mn alloy scaffolds endured 90 % of their yield strength for up to 3 × 106 loading cycles in air. Moreover, the scaffolds tolerated 3 × 106 loading cycles at 60 % of their yield strength in revised simulated body fluid. The Fe35Mn alloy scaffolds exhibited a capacity of withstanding 1.5-year physiological loading when used as bone implants.
Collapse
Affiliation(s)
- Niko E Putra
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, the Netherlands.
| | - Vahid Moosabeiki
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, the Netherlands
| | - Marius A Leeflang
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, the Netherlands
| | - Jie Zhou
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, the Netherlands
| | - Amir A Zadpoor
- Department of Biomechanical Engineering, Faculty of Mechanical Engineering, Delft University of Technology, the Netherlands
| |
Collapse
|
2
|
Teegen IS, Schadte P, Wille S, Adelung R, Siebert L, Kern M. Comparison of properties and cost efficiency of zirconia processed by DIW printing, casting and CAD/CAM-milling. Dent Mater 2023; 39:669-676. [PMID: 37230861 DOI: 10.1016/j.dental.2023.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 05/27/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the mechanical properties and cost efficiency of direct ink writing (DIW) printing of two different zirconia inks compared to casting and subtractive manufacturing. METHODS Zirconia disks were manufactured by DIW printing and the casting process and divided into six subgroups (n = 20) according to sintering temperatures (1350 °C, 1450 °C and 1550 °C) and two different ink compositions (Ink 1, Ink 2). A CAD/CAM-milled high strength zirconia (3Y-TZP) was added as reference group. The biaxial flexural strength (BFS) was measured using the piston-on-three-balls test. X-ray-diffraction (XRD) was used for microstructural analysis. The cost efficiency was compared for DIW printing and subtractive manufacturing by calculation of the manufacturing costs of one dental crown. RESULTS Using XRD, monoclinic and tetragonal phases were detected for Ink 1, for all other groups no monoclinic phase was detected. The CAD/CAM-milled ceramic showed a significantly higher BFS than all other groups. The BFS of Ink 2 was significantly higher than the BFS of Ink 1. At a sintering temperature of 1550 °C the mean BFS of the printed Ink 2 was 822 ± 174 MPa. The BFS of the cast materials did not show a significantly higher BFS than the corresponding printed group for any tested parameter-set. The manufacturing costs of DIW printed crowns are lower than the manufacturing costs of CAD/CAM-milled crowns. CONCLUSION DIW has a high potential to replace subtractive processes for dental applications, as it shows promising mechanical properties for appropriate ink compositions and facilitates a highly cost effective production.
Collapse
Affiliation(s)
- Isabell-Sophie Teegen
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Kiel University, Arnold-Heller-Straße 16, 24105 Kiel, Germany.
| | - Philipp Schadte
- Department of Material Science, Faculty of Engineering, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany.
| | - Sebastian Wille
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Kiel University, Arnold-Heller-Straße 16, 24105 Kiel, Germany.
| | - Rainer Adelung
- Department of Material Science, Faculty of Engineering, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany.
| | - Leonard Siebert
- Department of Material Science, Faculty of Engineering, Kiel University, Kaiserstr. 2, 24143 Kiel, Germany.
| | - Matthias Kern
- Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Kiel University, Arnold-Heller-Straße 16, 24105 Kiel, Germany.
| |
Collapse
|
3
|
Chen Q, Tian E, Wang Y, Mo J, Xu G, Zhu M. Recent Progress and Perspectives of Direct Ink Writing Applications for Mass Transfer Enhancement in Gas-Phase Adsorption and Catalysis. SMALL METHODS 2023; 7:e2201302. [PMID: 36871146 DOI: 10.1002/smtd.202201302] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 02/11/2023] [Indexed: 06/09/2023]
Abstract
Conventional adsorbents and catalysts shaped by granulation or extrusion have high pressure drop and poor flexibility for chemical, energy, and environmental processes. Direct ink writing (DIW), a kind of 3D printing, has evolved into a crucial technique for manufacturing scalable configurations of adsorbents and catalysts with satisfactory programmable automation, highly optional materials, and reliable construction. Particularly, DIW can generate specific morphologies required for excellent mass transfer kinetics, which is essential in gas-phase adsorption and catalysis. Here, DIW methodologies for mass transfer enhancement in gas-phase adsorption and catalysis, covering the raw materials, fabrication process, auxiliary optimization methods, and practical applications are comprehensively summarized. The prospects and challenges of DIW methodology in realizing good mass transfer kinetics are discussed. Ideal components with a gradient porosity, multi-material structure, and hierarchical morphology are proposed for future investigations.
Collapse
Affiliation(s)
- Qiwei Chen
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, 100084, China
- Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing, 100084, China
| | - Enze Tian
- Songshan Lake Materials Laboratory, Dongguan, 523808, China
- Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yan Wang
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, 100084, China
- Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing, 100084, China
| | - Jinhan Mo
- Department of Building Science, School of Architecture, Tsinghua University, Beijing, 100084, China
- Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing, 100084, China
- Key Laboratory of Eco Planning & Green Building, Ministry of Education (Tsinghua University), Beijing, 100084, China
| | - Guiyin Xu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
| |
Collapse
|
4
|
Mathematical modeling of high-energy materials rheological behavior in 3D printing technology. Heliyon 2022; 9:e12026. [PMID: 36699269 PMCID: PMC9868377 DOI: 10.1016/j.heliyon.2022.e12026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/14/2022] [Accepted: 11/24/2022] [Indexed: 12/12/2022] Open
Abstract
In this paper, a mathematical model of the extrusion process in 3D printing of high-energy composites is studied. These composites are formed from polymer binder and powder with bimodal particles obtained by electric explosion technique. The main difficulty of extrusion 3D printing method is primarily linked to the high viscosity of utilized material, especially one with high concentration of particles. In this case, the viscosity of the initial mixture depends on the pressure, temperature and concentration of the filler, as well as on the particle dispersion. Under certain conditions the ignition of high-energy material in the nozzle is possible, thus the search for optimal printing parameters based on the mathematical modeling and the following experimental verification are the main purposes of the current work.
Collapse
|
5
|
Robocasting of dense 8Y zirconia parts: rheology, printing, and mechanical properties. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.11.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
6
|
3D Printing of Bioinert Oxide Ceramics for Medical Applications. J Funct Biomater 2022; 13:jfb13030155. [PMID: 36135590 PMCID: PMC9505679 DOI: 10.3390/jfb13030155] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 11/23/2022] Open
Abstract
Three-dimensionally printed metals and polymers have been widely used and studied in medical applications, yet ceramics also require attention. Ceramics are versatile materials thanks to their excellent properties including high mechanical properties and hardness, good thermal and chemical behavior, and appropriate, electrical, and magnetic properties, as well as good biocompatibility. Manufacturing complex ceramic structures employing conventional methods, such as ceramic injection molding, die pressing or machining is extremely challenging. Thus, 3D printing breaks in as an appropriate solution for complex shapes. Amongst the different ceramics, bioinert ceramics appear to be promising because of their physical properties, which, for example, are similar to those of a replaced tissue, with minimal toxic response. In this way, this review focuses on the different medical applications that can be achieved by 3D printing of bioinert ceramics, as well as on the latest advances in the 3D printing of bioinert ceramics. Moreover, an in-depth comparison of the different AM technologies used in ceramics is presented to help choose the appropriate methods depending on the part geometry.
Collapse
|
7
|
Lamnini S, Elsayed H, Lakhdar Y, Baino F, Smeacetto F, Bernardo E. Robocasting of advanced ceramics: ink optimization and protocol to predict the printing parameters - A review. Heliyon 2022; 8:e10651. [PMID: 36164511 PMCID: PMC9508426 DOI: 10.1016/j.heliyon.2022.e10651] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 09/07/2022] [Accepted: 09/09/2022] [Indexed: 11/26/2022] Open
Abstract
Direct-Ink-Writing (or robocasting) is a subset of extrusion-based additive manufacturing techniques that has grown significantly in recent years to design simple to complex ceramic structures. Robocasting, relies on the use of high-concentration powder pastes, also known as inks. A successful optimization of ink rheology and formulation constitutes the major key factor to ensure printability for the fabrication of self-supporting ceramic structures with a very precise dimensional resolution. However, to date achieving a real balance between a comprehensive optimization of ink rheology and the determination of a relevant protocol to predict the printing parameters for a given ink is still relatively scarce and has been not yet standardized in the literature. The current review reports, in its first part, a detailed survey of recent studies on how ink constituents and composition affect the direct-ink-writing of ceramic parts, taking into account innovative ceramic-based-inks formulations and processing techniques. Precisely, the review elaborates the major factors influencing on ink rheology and printability, specifically binder type, particle physical features (size, morphology and density) and ceramic feedstock content. In the second part, this review suggests a standardized guideline to effectively adapt a suitable setting of the printing parameters, such as printing speed and pressure, printing substrate, strut spacing, layer height, nozzle diameter in function of ink intrinsic rheology.
Collapse
Affiliation(s)
- Soukaina Lamnini
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy.,Materials Science, Energy & Nano engineering, MSN Department, University Mohammed VI Polytechnic Benguerir, Morocco
| | - Hamada Elsayed
- Department of Industrial Engineering, University of Padova, 35100 Padova, Italy.,Ceramics Department, National Research Centre, El-Bohous Street, 12622 Cairo, Egypt
| | - Yazid Lakhdar
- School of Metallurgy and Materials, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Francesco Baino
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Federico Smeacetto
- Institute of Materials Physics and Engineering, Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Enrico Bernardo
- Department of Industrial Engineering, University of Padova, 35100 Padova, Italy
| |
Collapse
|
8
|
Marnot A, Dobbs A, Brettmann B. Material extrusion additive manufacturing of dense pastes consisting of macroscopic particles. MRS COMMUNICATIONS 2022; 12:483-494. [PMID: 36312900 PMCID: PMC9596591 DOI: 10.1557/s43579-022-00209-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 07/13/2022] [Indexed: 06/16/2023]
Abstract
Additive manufacturing of dense pastes, those with greater than 50 vol% particles, via material extrusion direct ink write is a promising method to produce customized structures for high-performance materials, such as energetic materials and pharmaceuticals, as well as to enable the use of waste or other locally available particles. However, the high volume fraction and the large sizes of the particles for these applications lead to significant challenges in developing inks and processing methods to prepare quality parts. In this prospective, we analyze challenges in managing particle characteristics, stabilizing the suspensions, mixing the particles and binder, and 3D printing the pastes.
Collapse
Affiliation(s)
- Alexandra Marnot
- Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, USA
| | - Alexandra Dobbs
- Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, USA
| | - Blair Brettmann
- Chemical and Biomolecular Engineering, Materials Science and Engineering, Georgia Institute of Technology, Atlanta, USA
| |
Collapse
|
9
|
Review of the Problems of Additive Manufacturing of Nanostructured High-Energy Materials. MATERIALS 2021; 14:ma14237394. [PMID: 34885552 PMCID: PMC8658636 DOI: 10.3390/ma14237394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/27/2021] [Accepted: 11/30/2021] [Indexed: 01/06/2023]
Abstract
This article dwells upon the additive manufacturing of high-energy materials (HEM) with regards to the problems of this technology’s development. This work is aimed at identifying and describing the main problems currently arising in the use of AM for nanostructured high-energy materials and gives an idea of the valuable opportunities that it provides in the hope of promoting further development in this area. Original approaches are proposed for solving one of the main problems in the production of nanostructured HEM—safety and viscosity reduction of the polymer-nanopowder system. Studies have shown an almost complete degree of deagglomeration of microencapsulated aluminum powders. Such powders have the potential to create new systems for safe 3D printing using high-energy materials.
Collapse
|
10
|
Applying extrusion-based 3D printing technique accelerates fabricating complex biphasic calcium phosphate-based scaffolds for bone tissue regeneration. J Adv Res 2021; 40:69-94. [PMID: 36100335 PMCID: PMC9481949 DOI: 10.1016/j.jare.2021.12.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/09/2021] [Accepted: 12/23/2021] [Indexed: 12/17/2022] Open
Abstract
Biphasic calcium phosphates offer a chemically similar biomaterial to the natural bone, which can significantly accelerate bone formation and reconstruction. Robocasting is a suitable technique to produce porous scaffolds supporting cell viability, proliferation, and differentiation. This review discusses materials and methods utilized for BCP robocasting, considering recent advancements and existing challenges in using additives for bioink preparation. Commercialization and marketing approach, in-vitro and in-vivo evaluations, biologic responses, and post-processing steps are also investigated. Possible strategies and opportunities for the use of BCP toward injured bone regeneration along with clinical applications are discussed. The study proposes that BCP possesses an acceptable level of bone substituting, considering its challenges and struggles.
Background Aim of review Key scientific concepts of review
Collapse
|
11
|
Characterization of 3D Printed Yttria-Stabilized Zirconia Parts for Use in Prostheses. NANOMATERIALS 2021; 11:nano11112942. [PMID: 34835706 PMCID: PMC8619596 DOI: 10.3390/nano11112942] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 12/24/2022]
Abstract
The main aim of the present paper is to study and analyze surface roughness, shrinkage, porosity, and mechanical strength of dense yttria-stabilized zirconia (YSZ) samples obtained by means of the extrusion printing technique. In the experiments, both print speed and layer height were varied, according to a 22 factorial design. Cuboid samples were defined, and three replicates were obtained for each experiment. After sintering, the shrinkage percentage was calculated in width and in height. Areal surface roughness, Sa, was measured on the lateral walls of the cuboids, and total porosity was determined by means of weight measurement. The compressive strength of the samples was determined. The lowest Sa value of 9.4 μm was obtained with low layer height and high print speed. Shrinkage percentage values ranged between 19% and 28%, and porosity values between 12% and 24%, depending on the printing conditions. Lowest porosity values correspond to low layer height and low print speed. The same conditions allow obtaining the highest average compressive strength value of 176 MPa, although high variability was observed. For this reason, further research will be carried out about mechanical strength of ceramic 3D printed samples. The results of this work will help choose appropriate printing conditions extrusion processes for ceramics.
Collapse
|
12
|
Analysis of AM Parameters on Surface Roughness Obtained in PLA Parts Printed with FFF Technology. Polymers (Basel) 2021; 13:polym13142384. [PMID: 34301141 PMCID: PMC8309545 DOI: 10.3390/polym13142384] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/16/2021] [Accepted: 07/17/2021] [Indexed: 11/16/2022] Open
Abstract
Fused filament fabrication (FFF) 3D printing technology allows very complex parts to be obtained at a relatively low cost and in reduced manufacturing times. In the present work, the effect of main 3D printing parameters on roughness obtained in curved surfaces is addressed. Polylactic acid (PLA) hemispherical cups were printed with a shape similar to that of the acetabular part of the hip prostheses. Different experiments were performed according to a factorial design of experiments, with nozzle diameter, temperature, layer height, print speed and extrusion multiplier as variables. Different roughness parameters were measured—Ra, Rz, Rku, Rsk—both on the outer surface and on the inner surface of the parts. Arithmetical mean roughness value Ra and greatest height of the roughness profile Rz are usually employed to compare the surface finish among different manufacturing processes. However, they do not provide information about the shape of the roughness profile. For this purpose, in the present work kurtosis Rku and skewness Rsk were used. If the height distribution in a roughness profile follows a normal law, the Rku parameter will take a value of 3. If the profile distribution is symmetrical, the Rsk parameter will take a value of 0. Adaptive neural fuzzy inference system (ANFIS) models were obtained for each response. Such models are often employed to model different manufacturing processes, but their use has not yet been extended to 3D printing processes. All roughness parameters studied depended mainly on layer height, followed by nozzle diameter. In the present work, as a general trend, Rsk was close to but lower than 0, while Rku was slightly lower than 3. This corresponds to slightly higher valleys than peaks, with a rounded height distribution to some degree.
Collapse
|
13
|
Buj-Corral I, Bagheri A, Sivatte-Adroer M. Effect of Printing Parameters on Dimensional Error, Surface Roughness and Porosity of FFF Printed Parts with Grid Structure. Polymers (Basel) 2021; 13:1213. [PMID: 33918648 PMCID: PMC8070634 DOI: 10.3390/polym13081213] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 12/18/2022] Open
Abstract
Extrusion printing processes allow for manufacturing complex shapes in a relatively cheap way with low-cost machines. The present study analyzes the effect of printing parameters on dimensional error, roughness, and porosity of printed PLA parts obtained with grid structure. Parts are obtained by means of the fused filament fabrication (FFF) process. Four variables are chosen: Layer height, temperature, speed, and flow rate. A two-level full factorial design with a central point is used to define the experimental tests. Dimensional error and porosity are measured with a profile projector, while roughness is measured with a contact roughness meter. Mathematical regression models are found for each response, and multi-objective optimization is carried out by means of the desirability function. Dimensional error and roughness depend mainly on layer height and flow rate, while porosity depends on layer height and printing speed. Multi-objective optimization shows that recommended values for the variables are layer height 0.05 mm, temperature 195 ºC, speed 50 mm/min, and flow rate 0.93, when dimensional error and roughness are to be minimized, and porosity requires a target value of 60%. The present study will help to select appropriate printing parameters for printing porous structures such as those found in prostheses, by means of extrusion processes.
Collapse
Affiliation(s)
- Irene Buj-Corral
- Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), 08028 Barcelona, Spain;
| | - Ali Bagheri
- Department of Mechanical Engineering, Barcelona School of Industrial Engineering (ETSEIB), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), 08028 Barcelona, Spain;
| | - Maurici Sivatte-Adroer
- Department of Mechanical Engineering, Vilanova i la Geltrú School of Engineering (EPSEVG), Universitat Politècnica de Catalunya-Barcelona Tech (UPC), 08880 Vilanova i la Geltrú, Spain;
| |
Collapse
|
14
|
Fountas NA, Vaxevanidis NM. Optimization of fused deposition modeling process using a virus-evolutionary genetic algorithm. COMPUT IND 2021. [DOI: 10.1016/j.compind.2020.103371] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|