Influence of change in layer thickness on mechanical properties of components 3D printed on Zortrax M 200 FDM printer with Z-ABS filament material & Accucraft i250+ FDM printer with low cost ABS filament material

2020 ◽  
Vol 26 ◽  
pp. 1315-1322 ◽  
Author(s):  
Sunil Khabia ◽  
Kamlesh K. Jain
Keyword(s):  
Mechanical Properties ◽  
Layer Thickness ◽  
Low Cost ◽  
3D Printed

scholarly journals Graphite Modified Polylactide (PLA) for 3D Printed (FDM/FFF) Sliding Elements

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1250 ◽  
Author(s):  
Robert E. Przekop ◽  
Maciej Kujawa ◽  
Wojciech Pawlak ◽  
Marta Dobrosielska ◽  
Bogna Sztorch ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Stress ◽  
Low Cost ◽  
Chemical Properties ◽  
Spare Parts ◽  
The Other ◽  
Graphite Content ◽  
Before And After ◽  
3D Printed ◽  
And Chemical Properties

With the development of 3D printing technology, there is a need to produce printable materials with improved properties, e.g., sliding properties. In this paper, the authors present the possibilities of producing composites based on biodegradable PLA with the addition of graphite. The team created composites with the following graphite weight contents: 1%, 2.5%, 5%, 7.5%, and 10%. Neat material was also subjected to testing. Tribological, mechanical, and chemical properties of the mentioned materials were examined. Measurements were also made after keeping the samples in ageing and climatic ovens. Furthermore, SEM observations of samples before and after friction tests were carried out. It was demonstrated that increasing graphite content caused a significant decrease in wear (PLA + 10% graphite had a wear rate three times lower than for a neat material). The addition of graphite did not adversely affect most of the other properties, but it ought to be noted that mechanical properties changed significantly. After conditioning in a climatic oven PLA + 10% graphite has (in comparison with neat material) 11% lower fracture stress, 47% lower impact strength, and 21% higher Young’s modulus. It can be certainly stated that the addition of graphite to PLA is a step towards obtaining a material that is low-cost and suitable for printing sliding spare parts.

scholarly journals Influence of Layer Thickness and Raster Angle on the Mechanical Properties of 3D-Printed PEEK and a Comparative Mechanical Study between PEEK and ABS

Materials ◽  
2015 ◽  
Vol 8 (9) ◽  
pp. 5834-5846 ◽  
Author(s):  
Wenzheng Wu ◽  
Peng Geng ◽  
Guiwei Li ◽  
Di Zhao ◽  
Haibo Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Layer Thickness ◽  
Mechanical Study ◽  
Raster Angle ◽  
3D Printed

scholarly journals Printability and properties of 3D-printed poplar fiber/polylactic acid biocomposite

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 2774-2788
Author(s):  
Zhaozhe Yang ◽  
Xinhao Feng ◽  
Min Xu ◽  
Denis Rodrigue
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Rheological Properties ◽  
Layer Thickness ◽  
Polylactic Acid ◽  
Physical And Mechanical Properties ◽  
Longitudinal Stripe ◽  
3D Printed ◽  
First Time ◽  
Printing Parameters

To efficiently and economically utilize a wood-plastic biocomposite, an eco-friendly biocomposite was prepared using modified poplar fiber and polylactic acid (PLA) via 3D printing technology for the first time. First, the effects of poplar fiber (0, 1, 3, 5, 7, and 9%) on the mechanical and rheological properties of the printed biocomposites were investigated. Subsequently, the printing parameters, including printing temperature, speed, and layer thickness, were optimized to obtain the biocomposite with superior properties. Finally, four printing orientations were applied to the biocomposite based on the optimized printing parameters to study the effect of filament orientation on the properties of the biocomposite. Favorable printability and mechanical properties of the biocomposite were obtained at 5% poplar fiber. The optimal printing temperature of 220 °C, speed of 40 mm/s, and layer thickness of 0.2 mm were obtained to produce the desired mechanical properties of the biocomposite with the printing orientation in a longitudinal stripe. However, the printing parameters should be chosen according to the applications, where different physical and mechanical properties are needed to achieve efficient and economical utilization of the biocomposites.

scholarly journals Simulated and Experimental Investigation of Mechanical Properties for Improving Isotropic Fracture Strength of 3D-Printed Capsules

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4677
Author(s):  
Taeuk Lim ◽  
Hao Cheng ◽  
Wonil Song ◽  
Jasung Lee ◽  
Sunghoon Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Strength ◽  
High Speed ◽  
Applied Load ◽  
Low Cost ◽  
Powder Layer ◽  
Strength Analysis ◽  
Self Healing ◽  
Compression Tests ◽  
3D Printed

Three-dimensional (3D) printer-based self-healing capsules, embedded in cement composites, were proposed to heal cracks, as they allow for various structural designs of capsules, repeatable fabrication, and strength analysis. Out of many 3D printing methods, such as fusion deposition modeling (FDM), powder layer fusion, and PolyJet printing, FDM was used to design, analyze, and produce new self-healing capsules, which are widely used due to their high-speed, low-cost, and precise manufacturing. However, the PLA extruded in the FDM had low adhesion energy between stacked layers, which caused a degradation of the performance of the self-healing capsule, because it had different strengths depending on the angle between the stacked layers and the applied load within the concrete structure. Therefore, in this paper, specimens were produced, in accordance with ASTM specifications, using the FDM PLA method, and mechanical properties were obtained through tensile, shear, and compression tests. Additionally, the isotropic fracture characteristics of the four types of capsules were analyzed through finite element method analysis. Subsequently, the 3D-printed capsules were produced, and the fracture strength was analyzed in the x, y and z directions of the applied load through a compression test. As a result, the newly proposed capsule design was verified to have an isotropic fracture strength value of 1400% in all directions compared to conventional spherical thin film capsules

Optimization of FDM process parameters for tensile properties of polylactic acid specimens using Taguchi design of experiment method

2020 ◽  
pp. 089270572096456
Author(s):  
M Heidari-Rarani ◽  
N Ezati ◽  
P Sadeghi ◽  
MR Badrossamay
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Layer Thickness ◽  
Polylactic Acid ◽  
Process Parameters ◽  
Design Of Experiment ◽  
Taguchi Design Of Experiment ◽  
Experiment Method ◽  
3D Printed ◽  
Printing Speed

Fused deposition modeling (FDM) is the most common method for additive manufacturing of polymers, which is expanding in various engineering applications due to its ability to make complex parts readily. The mechanical properties of 3D printed parts strongly depend on the correct selection of the process parameters. In this study, the effect of three important process parameters such as infill density, printing speed and layer thickness were investigated on the tensile properties of polylactic acid (PLA) specimens. Taguchi design of experiment method is applied to reduce the number of experiments and find the optimal parameters for maximum mechanical properties, minimum weight and minimum printing time. Experimental results showed that the optimum process parameters for the modulus of elasticity and ultimate tensile strength were infill density of 80%, printing speed of 40 mm/s and layer thickness of 0.1 mm, while for the failure strain were the infill density of 80%, printing speed of 40 mm/s and layer thickness of 0.2 mm. Finally, the accuracy of the Taguchi method was assessed for prediction of mechanical properties of FDM-3D printed specimens.

scholarly journals Development of Weather-Resistant 3D Printed Structures by Multi-Material Additive Manufacturing

2020 ◽  
Vol 4 (3) ◽  
pp. 94 ◽  
Author(s):  
Arash Afshar ◽  
Roy Wood
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Structural Integrity ◽  
Low Cost ◽  
Acrylonitrile Butadiene Styrene ◽  
Outdoor Environments ◽  
3D Printed ◽  
Novel Method ◽  
Structural Surface

Additive manufacturing, or 3D printing, has had a big impact on the manufacturing world through its low cost, material recyclability, and fabrication of intricate geometries with a high resolution. Three-dimensionally printed polymer structures in aerospace, marine, construction, and automotive industries are usually intended for service in outdoor environments. During long-term exposures to harsh environmental conditions, the mechanical properties of these structures can be degraded significantly. Developing coating systems for 3D printed parts that protect the structural surface against environmental effects and provide desired surface properties is crucial for the long-term integrity of these structures. In this study, a novel method was presented to create 3D printed structures coated with a weather-resistant material in a single manufacturing operation using multi-material additive manufacturing. One group of specimens was 3D printed from acrylonitrile-butadiene-styrene (ABS) material and the other group was printed from ABS and acrylic-styrene-acrylonitrile (ASA) as a substrate and coating material, respectively. The uncoated ABS specimens suffered significant degradation in the mechanical properties, particularly in the failure strain and toughness, during exposure to UV radiation, moisture, and high temperature. However, the ASA coating preserved the mechanical properties and structural integrity of ABS 3D printed structures in aggressive environments.

Effects of printing layer thickness on mechanical properties of 3D-printed custom trays

2020 ◽  
Author(s):  
Yanping Liu ◽  
Wei Bai ◽  
Xian Cheng ◽  
Jiehua Tian ◽  
Donghao Wei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Layer Thickness ◽  
3D Printed

Assessment of Low Cost, Sustainable, Reflective Layers for Optical Mixing

2013 ◽  
Vol 572 ◽  
pp. 62-65 ◽  
Author(s):  
Wil Peels ◽  
Kevin Cheng ◽  
Jonathan Hu ◽  
Joe Jiao ◽  
Ding Jin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Layer Thickness ◽  
Low Cost ◽  
Main Route ◽  
Optical Mixing ◽  
Lighting Systems ◽  
Screen Printed

The reflective properties of white solder masks are subject to this investigation. Selected materials were used to fabricate test boards with increasing solder resist thickness, ranging from 1 to 4 layers. Reflectivity and reflectivity loss were measured, and some visual and mechanical properties. Our main conclusion is that high reflective white solder masks appear suitable for optical mixing design-in for lighting systems. The main route seems to be to print a first layer of a white photosensitive solder resist, which will define the component footprint for soldering; followed by multiple layers of a screen printed, thermal curable white resist, with slightly bigger opening, which will give the needed reflectivity and stability. Reflectivity increases with increasing layer thickness from 87-90% for one layer of 20µm to 95% for four layers or 80µm. Reflectivity loss up to 10% is observed in the blue spectrum after heat treatment for 1000hrs at 100°C.

scholarly journals Optimization of Manufacturing Parameters of 3D Printed Solid Microneedles for Transdermal Drug Delivery

2021 ◽  
Vol 4 (1) ◽  
pp. 22
Author(s):  
Kenan Muhamedagić ◽  
Amina Tucak ◽  
Merima Sirbubalo ◽  
Ognjenka Rahić ◽  
Lamija Hindija ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Transdermal Drug Delivery ◽  
Isopropyl Alcohol ◽  
Low Cost ◽  
Curing Temperature ◽  
Curing Time ◽  
Curing Conditions ◽  
3D Printed ◽  
Fracture Tests ◽  
Manufacturing Parameters

Microneedles (MNs) have been manufactured using a variety of methods from a range of materials, but most of them are expensive and time-consuming for screening new designs and making any modifications. Therefore, stereolithography (SLA) has emerged as a promising approach for MN fabrication due to its numerous advantages, including simplicity, low cost, and the ability to manufacture complex geometrical products at any time, including modifications to the original designs. This work aimed to print MNs using SLA technology and investigate the effects of post-printing curing conditions on the mechanical properties of 3D-printed MNs. Solid MNs were designed using CAD software and printed with grey resin (Formlabs, UK) using a Form 3 printer (Formlabs, UK). MNs dimensions were 1.2 × 0.4 × 0.05 mm, arranged in 6 rows and 6 columns on a 10 × 10 mm baseplate. MNs were then immersed in an isopropyl alcohol bath to remove unpolymerized resin residues and cured in a UV-A heated chamber (Formlabs, UK). In total, nine samples were taken for each combination of curing temperature (35, 50, and 70 °C) and curing time (5, 20, and 60 min). Fracture tests were conducted using a hardness apparatus TB24 (Erweka, Germany). MNs were placed on the moving probe of the machine and compressed until fracture. The optimization of the SLA process parameters for improving the strength of MNs was performed using the Taguchi method. The design of experiments was carried out based on the Taguchi L9 orthogonal array. Experimental results showed that the curing temperature has a significant influence on MN strength improvements. Improvement of the MN strength can be achieved by increasing the curing temperature and curing time.

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