Observation of porous Structure’s deformation wear after axial loading with the use of Industrial computed tomography (CT)

Tkac, Jozef; Tóth, Teodor; Molnár, Viktor; Dovica, Miroslav; Fedorko, Gabriel

doi:10.1016/j.measurement.2022.111631

Cited by 9 publications

(7 citation statements)

References 21 publications

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“…In the report presented by Tkac [51], CT is used to analyze the porosity of a part based on the 3D-printed model of the lattice structure. This same part is used in [52] to perform a mechanical structure analysis.…”

Section: Computed Tomographymentioning

confidence: 99%

Structural and Dimensional Analysis by Computed Tomography of Multi Geometric Template Manufactured by Fused Deposition Modeling

Aguilar-Duque¹,

Ontiveros²,

Báez-López³

et al. 2023

Preprint

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During the last decade of the 20th century, there has been significant growth in the applications and development of manufacturing processes associated with Additive Manufacturing (AM). The evolution of production systems has made it possible that today there are more than 20 technologies associated with this production system. As a consequence of the development of AM, strategies have been developed to optimize the printing process focused on reducing manufacturing time, such as using Genetic Algorithms (GA). The effect caused by the modification of the path patterns is an effect of interest in two aspects; on the one hand, the dimensional assurance focused on the compliance of the dimensions of the components in comparison with the digital design of the same, and on the other hand, the structural composition and resistance that the printing process itself can generate. This paper aims to present the effect of optimizing the path of Fused Filament Fabrication (FFF) equipment on the dimensional finish and structural quality of a multi-geometric component. For this purpose, a template composed of 23 geometric elements, printed by FFF technology, using PLA as base material, is used. The dimensional analysis is performed using Geomagic software, and the porosity analysis is performed using VG Studio software concerning the 134 attributes of interest. The results show, on the one hand, a 12% reduction in the total process time required to print the component. On the other hand, using Computed Tomography (CT), it was identified the effect on the dimensional precision of printing three elements with characteristics associated with the angular precision or definition of external angles and the roundness demanded by an unsupported cantilevered arch. In addition, it was possible to ensure that the structural quality of the multi-geometric component was not affected by the modification of the path required by the printing process.

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Section: Computed Tomographymentioning

confidence: 99%

Structural and Dimensional Analysis by Computed Tomography of Multi Geometric Template Manufactured by Fused Deposition Modeling

Aguilar-Duque¹,

Ontiveros²,

Báez-López³

et al. 2023

Preprint

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“…4.2 Geometric analysis using nondestructive computed tomography CT made it possible to qualitatively evaluate the manufactured cellular structures by the additive L-PBF method. Based on the volumetric models obtained, dimensional deviations from the ideal geometry were analyzed, the actual value of relative density was determined and wall thicknesses were compared to the ideal geometry (Karme et al, 2015;Otto et al, 2022;van Eijnatten et al, 2018). One of the most crucial measurements of cellular structures, real relative density, was determined with the help of CT scans.…”

Section: Mechanical Responses Of Strut-based Lattices Under Tensile L...mentioning

confidence: 99%

“…The use of CT scanning significantly helped in accurately determining the surface of the samples. However, discrepancies in the manufacturing accuracy and porosity of the samples were identified, indicating the need for further improvements in the manufacturing process (Tkac et al , 2022). The compression behavior of hollow structures in AM was investigated using CT to capture detailed images of microporosity.…”

Section: Introductionmentioning

confidence: 99%

Determination of cell size/structures and mechanical properties of additively manufactured metallic components using X-ray technique

Moj

Owsiński

Robak

et al. 2023

RPJ

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Purpose Additive manufacturing (AM), a rapidly evolving paradigm, has shown significant advantages over traditional subtractive processing routines by allowing for the custom creation of structural components with enhanced performance. Numerous studies have shown that the technical qualities of AM components are profoundly affected by the discovery of novel metastable substructures in diverse alloys. Therefore, the purpose of this study is to determine the effect of cell structure parameters on its mechanical response. Design/methodology/approach Initially, a methodology was suggested for testing porous materials, focusing on static tensile testing. For a qualitative evaluation of the cellular structures produced, computed tomography (CT) was used. Then, the CT scanner was used to analyze a sample and determine its actual relative density, as well as perform a detailed geometric analysis. Findings The experimental research demonstrates that the mechanical properties of a cell’s structure are significantly influenced by its shape during formation. It was also determined that using selective laser melting to produce cell structures with a minimum single-cell size of approximately 2 mm would be the most appropriate method. Research limitations/implications Further studies of cellular structures for testing their static tensile strength are planned for the future. The study will be carried out for a larger number of samples, taking into account a wider range of cellular structure parameters. An important step will also be the verification of the results of the static tensile test using numerical analysis for the model obtained by CT scanning. Originality/value The fabrication of metallic parts with different cellular structures is very important with a selective laser melted machine. However, the determination of cell size and structure with mechanical properties is quiet novel in this current investigation.

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“…In the study by Tkac [53], a part's porosity is examined using CT, using a 3D-printed replica of the lattice structure as a base. The mechanical structural study in [54] uses the same component. The portions stated in the previous paragraphs have one thing in common: they all have simple or recurring geometries.…”

Section: E Computed Tomographymentioning

confidence: 99%

A Dimensional Comparative by Computed Tomography of Path Printed Fabrication Algorithms of a Multi-Geometric Piece

Ontiveros,

Baez-Lopez,

Aguilar-Duque

et al. 2023

IEEE Access

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The use and advancement of manufacturing technologies related to additive manufacturing significantly increased in the final decade of the 20th century. Technology progressions have led to the creation of methods for streamlining the printing process, emphasizing cutting down on manufacturing time, including the use of Genetic Algorithms (GA). The effect produced by changing the path pattern is interesting for two reasons: a) dimensional accuracy focused on preserving the component's dimensions and b) the structural composition and strength that the printing process itself can produce. The objective of this article is to compare the effect of modifying the path (GA) versus the manufacturer algorithm (MA) of the 3d printed in two ways, one of them focused on the accuracy dimension of the geometries and the second from the structural point of view through the comparison by using Computed Tomography. Twenty-three geometrical pieces were employed in a template printed using FFF technology and PLA as the foundation material. The total process time needed to print the component was reduced by 11% due to the findings. Regarding the dimensional analysis, the average deviation produced by the GA path is less than that produced by the manufacturer's suggestion. Regarding the porosity analysis, the GA shows a more significant void percentage but less void dispersion; ironically, the porosity concentrates based on the suggested materials. These results are crucial for product conceptualization and deposition printing planning.

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Observation of porous Structure’s deformation wear after axial loading with the use of Industrial computed tomography (CT)

Cited by 9 publications

References 21 publications

Structural and Dimensional Analysis by Computed Tomography of Multi Geometric Template Manufactured by Fused Deposition Modeling

Structural and Dimensional Analysis by Computed Tomography of Multi Geometric Template Manufactured by Fused Deposition Modeling

Determination of cell size/structures and mechanical properties of additively manufactured metallic components using X-ray technique

A Dimensional Comparative by Computed Tomography of Path Printed Fabrication Algorithms of a Multi-Geometric Piece

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