Design parameters effects on relative density of triply periodic minimal surfaces for additive manufacturing

Ramírez, Emilio A.; Béraud, Nicolas; Pourroy, Franck; Villeneuve, François; Museau, Matthieu

doi:10.1016/j.procir.2021.05.002

Cited by 19 publications

(6 citation statements)

References 11 publications

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“…One of the most frequently used structures is the gyroid and various areas of its use are being investigated. Several authors have addressed the influence of gyroid parameters [ 25 , 26 ] on the mechanical properties of a designed structure [ 27 , 28 , 29 , 30 ] and on dimensional analysis depending on production technology and the material used [ 31 , 32 , 33 ]. This paper focuses on specimens’ metrological analysis with different relative densities manufactured using material extrusion technology from the Flexfill 92A material with the intent to provide methodological instructions for industrial computer tomography use in the assessment of objects produced by additive manufacturing.…”

Section: Discussionmentioning

confidence: 99%

Surface Evaluation of Gyroid Structures for Manufacturing Rubber–Textile Conveyor Belt Carcasses Using Micro-CT

Tkac,

Toth,

Fedorko

et al. 2023

Polymers

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Gyroid structures are among the most widely used three-dimensional elements produced by various additive manufacturing technologies. This paper focuses on a metrological analysis of Flexfill 92A material specimens with a relative density (25 to 85%) using industrial computer tomography. The results show that for a given structure, the best method is to use surface determination with the closure of internal defects in the material. The analysis implies that the smallest deviations of the specimens’ external dimensions were achieved with respect to the CAD model at the highest relative densities. The wall thickness shows the smallest percentage change of 0.5685 at 45% relative density and the largest at 25% and 85% relative density. The nominal–actual comparison of manufactured specimens to the CAD model shows the smallest cumulative deviation of 0.209 mm at 90% and 25% relative density, while it slightly increases with increasing relative density. All produced specimens have a smaller material volume than their theoretical volume value, while the percentage change in volume is up to 8.6%. The surface of specimens is larger compared with the theoretical values and the percentage change reaches up to 25.3%. The percentage of pores in the specimens increases with increasing relative density and reaches 6%. The acquired knowledge will be applied in the framework of research focused on the possibilities of using additive manufacturing to produce a skeleton of rubber–textile conveyor belts. This paper presents initial research on the possibility of replacing the carcass of rubber–textile belts with an additive technology use.

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Section: Discussionmentioning

confidence: 99%

Surface Evaluation of Gyroid Structures for Manufacturing Rubber–Textile Conveyor Belt Carcasses Using Micro-CT

Tkac,

Toth,

Fedorko

et al. 2023

Polymers

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“…C controls the expansion or contraction of the surface in three spatial directions and influences the density of the lattices [34]. It can assume constant value or be dependent on the spatial coordinates x, y, and z.…”

Section: Design Of Scaffolds Based On Tpmssmentioning

confidence: 99%

Design, Stereolithographic 3D Printing, and Characterization of TPMS Scaffolds

Gabrieli,

Wenger,

Mazza

et al. 2024

Materials

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Anatomical and functional tissue loss is one of the most debilitating problems and involves a great cost to the international health-care sector. In the field of bone tissue, the use of scaffolds to promote tissue regeneration is a topic of great interest. In this study, a combination of additive manufacturing and computational methods led to creating porous scaffolds with complex microstructure and mechanical behavior comparable to those of cancellous bone. Specifically, some representative models of triply periodic minimal surfaces (TPMSs) were 3D-printed through a stereolithographic technique using a dental resin. Schwarz primitive and gyroid surfaces were created computationally: they are characterized by a complex geometry and a high pore interconnectivity, which play a key role in the mechanism of cell proliferation. Several design parameters can be varied in these structures that can affect the performance of the scaffold: for example, the larger the wall thickness, the lower the elastic modulus and compressive strength. Morphological and mechanical analyses were performed to experimentally assess the properties of the scaffolds. The relationship between relative density and elastic modulus has been analyzed by applying different models, and a power-law equation was found suitable to describe the trend in both structures.

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“…These different parametrized function blocks, each having a certain function on the geometry of the model, can be linked together to generate algorithms based on mathematical functions and expressions. Grasshopper ® enables the user to fully use the potential of modern AM technologies in terms of manufacturability such as lattice structure, selective Voronoi tessellation, and many more [29,31,37,38,[52][53][54][55]. The student version of Rhino 7 and Grasshopper ® was used to visually program fully parameterizable algorithms to model base cells and simple geometry to help with the processes as well as to import models from SolidWorks ® , which was used to both model and prepare CAD data from both the helical gear as well as the bike seat.…”

Section: Rhino 7/grasshopper ®mentioning

confidence: 99%

Comparison of CAD Software for Designing Cellular Structures for Additive Manufacturing

Geyer,

Hölzl

2024

Applied Sciences

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Additive manufacturing (AM) technologies provide significant design freedom, which is highly desirable in today’s fast-paced product design processes. However, most of the parametric CAD software tools used today do not fully utilize this potential for freedom of form and design. Design mechanisms, such as topology optimization (TO), generative design (GD), and lattice structures, are available on the market to help designers minimize weight and material cost while maximizing the stiffness and flexibility of planned designs. This paper proposes a benchmarking approach for designers and engineers to select a suitable software tool for lattice structure generation for their specific applications. The approach includes preselecting software tools based on a weighted point evaluation of seven significant criteria. The tools are then evaluated based on key metrics such as computing time and file size of exported structures, as well as the following six distinctive attributes: usability, reliability, availability, performance, support, and cost. The evaluation process considers a total of 32 defined features. The investigation produced clear recommendations regarding overall performance, reliability, and user experience. The findings indicate that the option of a comprehensive support offering, as well as the initial and operational costs, are significant drivers in the decision-making process.

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Design parameters effects on relative density of triply periodic minimal surfaces for additive manufacturing

Cited by 19 publications

References 11 publications

Surface Evaluation of Gyroid Structures for Manufacturing Rubber–Textile Conveyor Belt Carcasses Using Micro-CT

Surface Evaluation of Gyroid Structures for Manufacturing Rubber–Textile Conveyor Belt Carcasses Using Micro-CT

Design, Stereolithographic 3D Printing, and Characterization of TPMS Scaffolds

Comparison of CAD Software for Designing Cellular Structures for Additive Manufacturing

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