Mechanical and fatigue performance of pressurized vessels fabricated with Multi Jet Fusion™ for automotive applications

Yelamanchi, Bharat; Mummareddy, Bhargavi; Santiago, Carolyn Carradero; Ojoawo, Babatunde; Metsger, Kyle; Helfferich, Buck; Zapka, Jason; Sillani, Francesco; MacDonald, Eric; Cortes, Pedro

doi:10.1016/j.addma.2021.102048

Cited by 8 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…AM techniques are the most promising manufacturing methods for the industrial sectors in the future [ 9 ]. Applications have already been implemented in the automotive [ 10 , 11 , 12 ], electronics [ 13 , 14 , 15 , 16 ], packaging [ 17 , 18 , 19 , 20 ], medical, [ 21 , 22 , 23 , 24 ], and other economic sectors. Existing AM technologies have differences not only in their operating principles but also in the materials utilized in each method [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Affordable Biocidal Ultraviolet Cured Cuprous Oxide Filled Vat Photopolymerization Resin Nanocomposites with Enhanced Mechanical Properties

et al. 2022

View full text Add to dashboard Cite

In this study, Cuprous Oxide (Cu2O), known for its mechanism against bacteria, was used as filler to induce biocidal properties on a common commercial resin stereolithography (SLA) 3D printing resin. The aim was to develop nanocomposites suitable for the SLA process with a low-cost process that mimic host defense peptides (HDPs). Such materials have a huge economic and societal influence on the global technological war on illness and exploiting 3D printing characteristics is an additional asset for these materials. Their mechanical performance was also investigated with tensile, flexural, Charpy’s impact, and Vickers microhardness tests. Morphological analysis was performed through scanning electron microscopy (SEM), atomic force microscopy (AFM), and energy-dispersive X-ray spectroscopy (EDS) analysis, while the thermal behavior was studied through Thermogravimetric Analysis (TGA). The antibacterial activity of the fabricated nanocomposites was investigated using a screening agar well diffusion method, for a gram-negative and a gram-positive bacterium. Three-dimensional printed nanocomposites exhibited antibacterial performance in all loadings studied, while their mechanical enhancement was approximately 20% even at low filler loadings, revealing a multi-functional performance and a potential of Cuprous Oxide implementation in SLA resin matrices for engineering and medical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Affordable Biocidal Ultraviolet Cured Cuprous Oxide Filled Vat Photopolymerization Resin Nanocomposites with Enhanced Mechanical Properties

et al. 2022

View full text Add to dashboard Cite

show abstract

“…As technologies continue to improve, additive manufacturing (AM) or 3D printing, is rapidly becoming a viable fabrication approach for commercial product, [1][2][3][4] which has been achieved due to advances in printable materials, printing quality and speed, etc. Despite these advances, however, AM still lags behind subtractive manufacturing in terms of accuracy.…”

Section: Introductionmentioning

confidence: 99%

Pixel‐Level Grayscale Manipulation to Improve Accuracy in Digital Light Processing 3D Printing

Montgomery

Demoly

Zhou

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Digital light processing (DLP) is a widely used additive manufacturing technique for functional applications due to its high accuracy and print speeds. However, a variety of factors such as pixel size, motion stage resolution, optical focus, and chemical properties of the resin limit DLP's minimum resolution. Recently, research into locally varying light intensities has led to the emergence of grayscale DLP printing, which offers new capabilities including sub‐pixel manipulation of the printed shape. Here, a methodology is developed to enhance accuracy beyond what is typically capable for a given projector resolution by using pixel‐level grayscale control to create round features from sharp pixels. A numerical representation of the DLP pixel shape is developed to account for the effects of the incident light patterns. A reaction‐diffusion model is then used to predict the printed shapes before and after grayscale enhancement. This model is used to determine the optimal pixel intensities to match a target shape. Finally, the minimum feature size allowed by the proposed method is explored. The promising results represent an important step forward in raising DLP printing to higher accuracy, which will allow the fabrication of functional and structural components with smaller features or smoother faces.

show abstract

“…These properties make polyamide more often used in medicine [ 43 ] and orthoses production [ 44 ]. The most common technologies used in the process of 3D printing parts from polyamide are fused deposition modeling (FDM) [ 45 ], selective laser sintering (SLS) [ 46 ], and multi jet fusion (MJF) [ 47 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Antibacterial Coating and Mechanical and Chemical Treatment on the Surface Properties of PA12 Parts Manufactured with SLS and MJF Techniques in the Context of Medical Applications

Bazan

Turek

Zakręcki³

2023

Materials

View full text Add to dashboard Cite

Additive manufacturing (AM) is a rapidly growing branch of manufacturing techniques used, among others, in the medical industry. New machines and materials and additional processing methods are improved or developed. Due to the dynamic development of post-processing and its relative novelty, it has not yet been widely described in the literature. This study focuses on the surface topography (parameters Sa, Sz, Sdq, Sds, Str, Sdr) of biocompatible polyamide 12 (PA12) samples made by selective laser sintering (SLS) and multi jet fusion (MJF). The surfaces of the samples were modified by commercial methods: four types of smoothing treatments (two mechanical and two chemical), and two antibacterial coatings. The smoothing treatment decreased the values of all analyzed topography parameters. On average, the Sa of the SLS samples was 33% higher than that of the MJF samples. After mechanical treatment, Sa decreased by 42% and after chemical treatment by 80%. The reduction in Sdq and Sdr is reflected in a higher surface gloss. One antibacterial coating did not significantly modify the surface topography. The other coating had a smoothing effect on the surface. The results of the study can help in the development of manufacturing methodologies for parts made of PA12, e.g., in the medical industry.

show abstract

Mechanical and fatigue performance of pressurized vessels fabricated with Multi Jet Fusion™ for automotive applications

Cited by 8 publications

References 28 publications

Affordable Biocidal Ultraviolet Cured Cuprous Oxide Filled Vat Photopolymerization Resin Nanocomposites with Enhanced Mechanical Properties

Affordable Biocidal Ultraviolet Cured Cuprous Oxide Filled Vat Photopolymerization Resin Nanocomposites with Enhanced Mechanical Properties

Pixel‐Level Grayscale Manipulation to Improve Accuracy in Digital Light Processing 3D Printing

Influence of Antibacterial Coating and Mechanical and Chemical Treatment on the Surface Properties of PA12 Parts Manufactured with SLS and MJF Techniques in the Context of Medical Applications

Contact Info

Product

Resources

About