Study Of the compression behaviours of 3D-printed PEEK/CFR-PEEK sandwich composite structures

Jiang, Houfeng; Aihemaiti, Patiguli; Aiyiti, Wurikaixi; Kasimu, Ayiguli

doi:10.1080/17452759.2021.2014636

Cited by 22 publications

(5 citation statements)

References 62 publications

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“…The design of the lattice is critical to controlling its functional properties 41–43 . Consequently, it is important to note that the grid like design is a simplification of the full lattice structure which is commonly implemented for biomedical applications 6–9 .…”

Section: Resultsmentioning

confidence: 99%

Chemical etching of Ti‐6Al‐4V biomaterials fabricated by selective laser melting enhances mesenchymal stromal cell mineralization

O'Keeffe,

Kotlarz,

Gonçalves

et al. 2024

J Biomedical Materials Res

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Porous titanium scaffolds fabricated by powder bed fusion additive manufacturing techniques have been widely adopted for orthopedic and bone tissue engineering applications. Despite the many advantages of this approach, topological defects inherited from the fabrication process are well understood to negatively affect mechanical properties and pose a high risk if dislodged after implantation. Consequently, there is a need for further post‐process surface cleaning. Traditional techniques such as grinding or polishing are not suited to lattice structures, due to lack of a line of sight to internal features. Chemical etching is a promising alternative; however, it remains unclear if changes to surface properties associated with such protocols will influence how cells respond to the material surface. In this study, we explored the response of bone marrow derived mesenchymal stem/stromal cells (MSCs) to Ti‐6Al‐4V whose surface was exposed to different durations of chemical etching. Cell morphology was influenced by local topological features inherited from the SLM fabrication process. On the as‐built surface, topological nonhomogeneities such as partially adhered powder drove a stretched anisotropic cellular morphology, with large areas of the cell suspended across the nonhomogeneous powder interface. As the etching process was continued, surface defects were gradually removed, and cell morphology appeared more isotropic and was suggestive of MSC differentiation along an osteoblastic‐lineage. This was accompanied by more extensive mineralization, indicative of progression along an osteogenic pathway. These findings point to the benefit of post‐process chemical etching of additively manufactured Ti‐6Al‐4V biomaterials targeting orthopedic applications.

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Section: Resultsmentioning

confidence: 99%

Chemical etching of Ti‐6Al‐4V biomaterials fabricated by selective laser melting enhances mesenchymal stromal cell mineralization

O'Keeffe,

Kotlarz,

Gonçalves

et al. 2024

J Biomedical Materials Res

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“…[4][5][6][7][8] FFF of high-temperature reinforced polymers (HTRP) is typically used to add a structural function for 3D-printed parts. [9][10][11] Extrusion of HTRP usually requires a high processing temperature to melt the feedstock filament (i.e., above the glass transition temperature). [12,13] On the other hand, DIW is based on the principle of continuous extrusion of a viscoelastic ink filament through a micronozzle to form a filament when the ink is coming out and is usually performed at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Non‐Planar Multiprocess Additive Manufacturing of Multifunctional Composites

Chauvette

Hia

Pierre

et al. 2023

Adv Materials Technologies

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Multiprocess additive manufacturing (AM) consists of integrating different 3D printing techniques to enable the fabrication of multifunctional parts, based on their geometry and material properties. The combination of fused filament fabrication (FFF) and direct ink writing (DIW) techniques, respectively involving thermoplastics and thermosetting polymers (or composites), often focuses on planar and small‐scale applications (i.e., few cm), with limited nozzle orientation freedom for the fabrication of complex parts. Many industries, such as the aerospace sector, could benefit from the AM of lightweight multifunctional parts. For instance, one of the key aircraft components, the abradable seal coating, is applied on gas turbine engines casing to increase engine efficiency and is mechanically abraded by the rotor blades during engine startup. Abradable coatings made of thermosetting polymer could be 3D‐printed using a multiprocess to obtain more functionalities. In this work, a non‐planar multiprocess AM approach involving FFF of a complex large sandwich panel structure with low material density and large‐scale DIW of an abradable thermosetting coating with controlled porosity for sound absorption potential, and better mechanical abradability than a commercial product, is presented. This multiprocess AM approach can be used to manufacture lightweight multifunctional structural parts for the automotive or aerospace industries.

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“…This manufacturing process uses heat to plasticise the material and thus, it relies on thermoplastic polymers such as ABS (acrylonitrile butadiene styrene), PLA (polylactic acid), and Nylon, with a relatively low melting point, allowing low-temperature heaters ranging from 200 • C to 250 • C. They usually offer medium mechanical strength compared to injection moulding [2], low thermal conductivity and are generally electrical insulators, with a resistivity of about 10 15 Ωm [3]. Many previous and recent studies have investigated the effect of the process parameters and building orientation on the mechanical properties of the printed structures, as well as for single and multimaterial structures [4][5][6]. In order to improve their properties and increase the functionality of the FDM method, various additives are added to the polymers to modify the properties, creating composite materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters on the Resistivity of 3D Printed Electrically Conductive Structures

2022

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With recent developments in conductive composites, new possibilities emerged for 3D printed conductive structures. Complementary to a vast number of publications on materials properties, here we investigate the influence of printing parameters on the resistance of 3D printed structures. The influence of printing temperature on the resistance is significant, with too low value (210 °C) leading to nozzle clogging, while increasing the temperature by 20 °C above the recommended printing settings decreases resistivity by 15%, but causing degradation of the polymer matrix. The limitations of the FDM technique, related to the dimension accuracy emerging from the layer-by-layer printing approach, greatly influence the samples’ cross-section, causing irregular resistivity values for different layer heights. For samples with layer thickness lower than 0.2 mm, regardless of the nozzle diameter (0.5–1 mm), high resistance is attributed to the quality of samples. But for a 1 mm nozzle, we observe stabilized values or resistance for 0.3 to 1 mm layer height. Comparing resistance values and layer height generated from the slicer software, we observe a direct correlation—for a larger height of the sample resistance value decrease. Presented modifications in printing parameters can affect the final resistance by 50%. Controlling several parameters simultaneously poses a great challenge for designing high-efficiency structural electronics.

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Study Of the compression behaviours of 3D-printed PEEK/CFR-PEEK sandwich composite structures

Cited by 22 publications

References 62 publications

Chemical etching of Ti‐6Al‐4V biomaterials fabricated by selective laser melting enhances mesenchymal stromal cell mineralization

Chemical etching of Ti‐6Al‐4V biomaterials fabricated by selective laser melting enhances mesenchymal stromal cell mineralization

Non‐Planar Multiprocess Additive Manufacturing of Multifunctional Composites

Influence of Process Parameters on the Resistivity of 3D Printed Electrically Conductive Structures

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