Numerical prediction of elastic properties for alumina green parts printed by stereolithography process

Michaud, Philippe; Pateloup, Vincent; Tarabeux, Justine; Alzina, Arnaud; Debenath, André; Chartier, Thierry

doi:10.1016/j.jeurceramsoc.2020.10.068

Cited by 6 publications

(5 citation statements)

References 43 publications

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“…The constitution of an elastoplastic model [15] described the mechanical behaviour of the SLA-printed parts, forming initial study approach for load carriers and storage shelves in the mechanical industrial field. Furthermore, another study made use of numerical modelling to predict the elastic properties of green SLA parts of an alumina suspension for structural applications [16]. With disparate applications from wide domains, SLA-type additive manufacturing bolsters provide case-to-case solutions, especially in printing pallets for specialized packaging and logistics operations.…”

Section: Stereolithographymentioning

confidence: 99%

“…With an increase in displacement and stress values in rack support in comparison to floor, forklift, and conveyor, a detailed comparison of the same is carried out separately for DLP and SLA, as tabulated in Table 17, Figure 26 and Table 18, and Figure 27, respectively, indicating a lower deflection in DLP condition, owing to area scanning parameters, thereby having an inherent toughness value [12,16].…”

Section: Iso Pallet 3d Simulationmentioning

confidence: 99%

“…With an increase in deflection and stress values in rack support in comparison to floor, forklift, and conveyor, a detailed comparison of the same is carried out separately for DLP and SLA processes for optimized conditions, as tabulated in Table 19, Figure 33, and Table 20, Figure 34, respectively, indicating lower deflection and stress contours in the DLP condition, owing to the areascanning parameter, thereby having inherent toughness value [12,16]. The surface material of the pallet in both conditions is made by availing biodegradable polymers like ProBLK10 and Grey V4 for the SLA and DLP processes.…”

Section: Optimized Pallet 3d Simulationsmentioning

confidence: 99%

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Experimental investigation of stereolithography and digital light processing additive manufactured pallets

Bairapudi,

Sastry,

Krishnaiah

et al. 2024

Materials Science-Poland

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Pallets are a tertiary form of packaging used for stacking, storing, protecting, or transporting goods in supply chains. They are utilized as a base for the unitization of goods for logistics and warehousing. Moreover, pallets can be manufactured using wood, plastic, metal, and corrugated paper, which can be used as material-handling equipment. With several products being transported worldwide and with year-on-year growth, it would be beneficial to make lightweight pallets. Such pallets are recyclable, easy to clean, cheap, and durable to maintain and store. Though most of the pallets are widely available for basic purposes, applications involving high-end bio-packings and transportation of special chemicals require specialized pallets to be manufactured like polymers to ensure a negligible chemical reaction, light in weight, and attenuation in freight capacity, thereby widespread reduction in wastage. With advancements, job to job and immediate requirements, additive manufacturing has the potential to close the gap for jobs with short lead times. If the design process of new pallets has limits the creation of specific codes, the transitions will be smoother in rapid prototyping. This work describes the development of polymer pallets by taking advantage of stereolithography (SLA) and digital light processing (DLP) technology for 3D printing pallets in correlation to injection moulding. After the pallets are designed and manufactured, AM technologies can be applied to specified standards, and the pallets then undergo tensile strength, elongation, and hardness tests. The analysis was carried out for configurable geometries adapting to fork lifting, conveyor, racking, and stacking conditions. Analytical and numerical solutions were carried out to understand the stress and deflections for each geometry and its wide range of applications for pallets.

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Section: Stereolithographymentioning

confidence: 99%

Section: Iso Pallet 3d Simulationmentioning

confidence: 99%

Section: Optimized Pallet 3d Simulationsmentioning

confidence: 99%

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Experimental investigation of stereolithography and digital light processing additive manufactured pallets

Bairapudi,

Sastry,

Krishnaiah

et al. 2024

Materials Science-Poland

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“…Natural fibers, recycled materials, and biodegradable polymers have been integrated and applied to the 3D printing processes, yielding composites with reduced environmental impacts [14][15][16]. Multiple AM processes, including fused deposition modeling (FDM), selective laser sintering (SLS), stereolithography (SLA), and direct ink writing (DIW), have been studied for the development of innovative printing techniques that can optimize sustainable composite fabrication [17][18][19][20][21]. As one of the most common methods for 3D printing of green composites, FDM-based AM uses filaments comprising natural fibers or recycled materials blended with biodegradable polymers and extruded materials layer by layer to create intricate 3D products and components.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing and Characterization of Sustainable Wood Fiber-Reinforced Green Composites

Billings,

Siddique,

Sherwood

et al. 2023

J. Compos. Sci.

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Enhancing mechanical properties of environmentally friendly and renewable polymers by the introduction of natural fibers not only paves the way for developing sustainable composites but also enables new opportunities in advanced additive manufacturing (AM). In this paper, wood fibers, as a versatile renewable resource of cellulose, are integrated within bio-based polylactic acid (PLA) polymer for the development and 3D printing of sustainable and recycle green composites using fused deposition modeling (FDM) technology. The 3D-printed composites are comprehensively characterized to understand critical materials properties, including density, porosity, microstructures, tensile modulus, and ultimate strength. Non-contact digital image correlation (DIC) technology is employed to understand local stress and strain concentration during mechanical testing. The validated FDB-based AM process is employed to print honeycombs, woven bowls, and frame bins to demonstrate the manufacturing capability. The performance of 3D-printed honeycombs is tested under compressive loads with DIC to fully evaluate the mechanical performance and failure mechanism of ultra-light honeycomb structures. The research outcomes can be used to guide the design and optimization of AM-processed composite structures in a broad range of engineering applications.

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“…Other parameters can also influence the final properties, such as part orientation, which generates the stair effect and therefore affects the surface quality; also, the exposure time between two consecutive layers, which affects the mechanical, physical and microstructural properties of the printed parts [9]. The degree of polymerisation during the printing of the green part influences the appearance of the curling effect [10]. Despite selecting the appropiate parameters for printing, it is also necessary to design supports to avoid deformations during the printing of certain part geometries.…”

Section: Introductionmentioning

confidence: 99%

Design of Supports to Avoid Deformations in the Process of Alumina Printing by Stereolithography

Martínez-Pellitero,

Souto,

Peláez Peláez

et al. 2023

KEM

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The excellent properties of ceramic materials make them essential for fields such as aeronautic, biomedical, dental, jewelry or electronic. However, the main drawback when manufacturing parts with these materials is their high brittleness. Additive manufacturing processes for ceramic materials allow this limitation to be overcame. Nevertheless, the required stages for additive manufacturing of ceramic parts make the process extremely difficult and with significant influence on the dimensional and geometrical precision.The stereolithography additive process for ceramic is similar to the conventional polymeric process, excepting that the raw material is a slurry of ceramic particles mixed with photosensitive resins. Consequently, two thermal post-processes are necessary to obtaining the final part: (i) debinding and (ii) sintering. Each of the stages in the process is critical because deformation, cracks or fractures can happen, mainly due to temperature changes during the post-processes. Consequently, a deep study of the stages of printing, debinding and sintering is necessary for optimizing them and to produce high-quality parts.In this work, two different types of supports have been studied to prevent deformations during the printing stage. Despite the great importance of supports in this additive manufacturing process, scarce information is available about their design beyond very general recommendations. This paper contains a preliminary study that reveals the effectiveness of using adequate supports to avoid deformations in the printing process. Parts have been scanned with a 3D structured light scanner and the obtained meshes compared with the nominal CAD. This comparison has revealed deformations during the sintering process; therefore, the need to extend the study of support design to the post-processing stages. Future work is necessary to extend this preliminary analysis of support design to improve the quality of SLA ceramic parts with different shape and size.

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Numerical prediction of elastic properties for alumina green parts printed by stereolithography process

Cited by 6 publications

References 43 publications

Experimental investigation of stereolithography and digital light processing additive manufactured pallets

Experimental investigation of stereolithography and digital light processing additive manufactured pallets

Additive Manufacturing and Characterization of Sustainable Wood Fiber-Reinforced Green Composites

Design of Supports to Avoid Deformations in the Process of Alumina Printing by Stereolithography

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