Vibration Characteristics of 3D Printed Viscoelastic Graded Polymeric Plates

2021 ◽  
Author(s):  
Justin Carter ◽  
Kumar Vikram Singh ◽  
Fazeel Khan
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Polymeric Materials ◽  
Vibration Characteristics ◽  
Thin Plates ◽  
Future Research ◽  
Structural Components ◽  
Processing Technologies ◽  
Fused Deposition ◽  
Multiple Materials

Abstract The exploration of structures made of multiple materials is a growing area of research as additive manufacturing processing technologies such as fused deposition modeling (FDM) 3D printing allows for their fabrication. Such a technology allows for rapid prototyping of structural components with complex geometries or spatially distributed materials with different properties and functionalities. By selecting suitable spatial distribution of materials, the performance of structural components can be manipulated and enhanced as per different engineering application needs. For a low-cost design of structural prototypes using 3D printing processes, viscoelastic polymeric materials are often used, having inherent damping properties. In this research, vibration characteristics of thin plates which are axially graded with multiple polymeric materials are investigated. The goal is to understand the influence of material grading on the frequency and damping characteristics of graded plates. Although in literature, material grading along the thickness in designing composite laminates and their vibration characteristics are available, the performance of plates having axially graded viscoelastic polymers have not been investigated yet. Through systematic modeling and experimental plans, vibration characteristics of axially graded viscoelastic plates are presented here. In particular, the damping performance for different grading schemes is evaluated. It is anticipated that such analysis will allow accurate modeling and testing of design prototypes of structural components for future research, such as design and testing of graded panels for enhanced flutter characteristics.

scholarly journals 3D-Printable PP/SEBS Thermoplastic Elastomeric Blends: Preparation and Properties

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 347 ◽  
Author(s):  
Shib Banerjee ◽  
Stephen Burbine ◽  
Nischay Kodihalli Shivaprakash ◽  
Joey Mead
Keyword(s):  
3D Printing ◽  
Carbon Black ◽  
Computer Aided Design ◽  
Fused Deposition Modeling ◽  
Mechanical Performance ◽  
Polymeric Materials ◽  
Fused Deposition ◽  
3D Printed ◽  
Injection Molded ◽  
Preferential Location

Currently, material extrusion 3D printing (ME3DP) based on fused deposition modeling (FDM) is considered a highly adaptable and efficient additive manufacturing technique to develop components with complex geometries using computer-aided design. While the 3D printing process for a number of thermoplastic materials using FDM technology has been well demonstrated, there still exists a significant challenge to develop new polymeric materials compatible with ME3DP. The present work reports the development of ME3DP compatible thermoplastic elastomeric (TPE) materials from polypropylene (PP) and styrene-(ethylene-butylene)-styrene (SEBS) block copolymers using a straightforward blending approach, which enables the creation of tailorable materials. Properties of the 3D printed TPEs were compared with traditional injection molded samples. The tensile strength and Young’s modulus of the 3D printed sample were lower than the injection molded samples. However, no significant differences could be found in the melt rheological properties at higher frequency ranges or in the dynamic mechanical behavior. The phase morphologies of the 3D printed and injection molded TPEs were correlated with their respective properties. Reinforcing carbon black was used to increase the mechanical performance of the 3D printed TPE, and the balancing of thermoplastic elastomeric and mechanical properties were achieved at a lower carbon black loading. The preferential location of carbon black in the blend phases was theoretically predicted from wetting parameters. This study was made in order to get an insight to the relationship between morphology and properties of the ME3DP compatible PP/SEBS blends.

scholarly journals COVID-19 and a novel initiative to improve safety by 3D printing personal protective equipment parts from computed tomography

2020 ◽  
Author(s):  
John Cote ◽  
John Haggstrom ◽  
Ranuga Vivkanandan ◽  
Kristin Ann Coté ◽  
Daniel Real ◽  
...  
Keyword(s):  
Computed Tomography ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Future Research ◽  
Short Supply ◽  
Fused Deposition ◽  
Electronic Caliper ◽  
3D Printed ◽  
Original Part ◽  
Improved Accuracy

Abstract Background Powered air-purifying respirators are in short supply and can break down with extended use. Replacement parts can become hard to acquire. The aim of this study was to create an innovative quality improvement proof of concept using rapid prototyping. Methods Here we report three cases of 3D printed powered air-purifying respirator parts. 3D printing was performed on all parts using fused deposition modeling with standard polylactic acid, in the same way that presurgical models would be created. Measurements using an electronic caliper as well as CT scans were used to compare an original part to its corresponding 3D printed parts for accuracy. Results Electronic caliper and computed tomography measurements both showed accuracy consistant with current published norms. Conclusions Ultimately, there will be questions surrounding intellectual property, effectiveness and potential long-term safety for these types of 3D printed parts. Future research should look into the addition of specific nanoparticles from the position of cost, efficacy, safety and improved accuracy.

scholarly journals 3D Prototype of Limited Lean Suspension System

2019 ◽  
Vol 8 (2S3) ◽  
pp. 843-847
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Fuel Efficiency ◽  
Suspension System ◽  
Digital Data ◽  
Future Research ◽  
Fused Deposition ◽  
Successive Layer ◽  
G Code ◽  
Deposition Modeling

3D printing is also known as Additive manufacturing (AM) process, where 3D objects are created by laying down into successive layer of material. In 1984, Charles Hull developed the technology of 3D printing from digital data and named the technique as Stereo lithography (STL) in 1986. In this project, create the prototype of Limited Lean Suspension System by using Fused Deposition Modeling (FDM) process in which the CAD model is designed in Catia v5 software and converted to STL format. The STL format is uploaded to FDM printer and works according to the G-code generated. This prototype is to study the kinematic parameters, working principle and in future research. By using Leaning application it will improves the vehicle stability, smooth cornering and fuel efficiency

The Use of Additive Manufacturing to Fabricate Structural Components for Wearable Robotic Devices

2015 ◽  
Author(s):  
Ray Churchwell ◽  
Kevin W. Hollander ◽  
Connor Theisen
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Joint Torque ◽  
Human Gait ◽  
Structural Components ◽  
Average Force ◽  
Fused Deposition ◽  
3D Printed ◽  
Robotic Devices

Our interest is in designing, fabricating and testing wearable robotic devices that assist human gait of able bodied individuals [1, 2]. Recently, we have been experimenting with Additive Manufacturing, 3D printing, using Fused Deposition Modeling technology as a method to fabricate key structural components for these robotic devices. A key structural component for the JTAR (Joint Torque Augmentation Robot) hip exoskeleton was manufactured using 3D printing and has been destructively tested to validate design requirements, the average force required to destroy the part was 2500 N with a standard deviation of 86 N, and this level of strength provided a safety factor in excess 4 times the expected load. The 3D printed part also has been successfully demonstrated on the JTAR robot for approximately 32 kilometers of hiking with no signs of degradation. The JTAR device has been demonstrated with the 3D printed hip mechanism in various environments, including treadmills and unconstrained outdoor environments.

scholarly journals A review on the fused deposition modeling (FDM) 3D printing: Filament processing, materials, and printing parameters

2021 ◽  
Vol 11 (1) ◽  
pp. 639-649
Author(s):  
Ruben Bayu Kristiawan ◽  
Fitrian Imaduddin ◽  
Dody Ariawan ◽  
Ubaidillah ◽  
Zainal Arifin
Keyword(s):  
3D Printing ◽  
Manufacturing Process ◽  
Fused Deposition Modeling ◽  
Critical Parameters ◽  
Future Research ◽  
Printing Process ◽  
Fused Deposition ◽  
Deposition Modeling ◽  
The Difference ◽  
Printing Parameters

Abstract This study aims to review research the progress on factors that affect the 3D printing results of the fused deposition modeling (FDM) process. The review is carried out by mapping critical parameters and characteristics determining FDM parameters, the effects of each parameter, and their interaction with other parameters. The study started from the filament manufacturing process, filament material types, and printing parameters of FDM techniques. The difference in each section has determined different parameters, and the respective relationships between parameters and other determinants during printing have a significant effect on printing results. This study also identifies several vital areas of previous and future research to optimize and characterize the critical parameters of the FDM printing process and FDM filament manufacturing.

Characterization of 3d printing filaments applied in restoration of sensitive archaeological objects using rapid prototyping

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Elvira Aura-Castro ◽  
Carmen Díaz-Marín ◽  
Xavier Mas-Barberà ◽  
Miguel Sánchez ◽  
Eduardo Vendrell Vidal
Keyword(s):  
3D Printing ◽  
Rapid Prototyping ◽  
Polylactic Acid ◽  
Fused Deposition Modeling ◽  
Polymeric Materials ◽  
Acrylonitrile Butadiene Styrene ◽  
Content Type ◽  
Fused Deposition ◽  
Archaeological Objects

Purpose The purpose of this paper is to characterize three-dimensional (3D) printing filaments commonly used in fused deposition modeling (FDM) to determine their viability for restoration and conservation treatments. Design/methodology/approach Eight current filaments for FDM from six polymeric materials have been characterized to determine their suitability for restoration and conservation treatments. For testing these filaments, specimens are printed with acrylonitrile-butadiene-styrene; polylactic acid; polylactic acid with CaCO3 (E.P.); polyethylene terephthalate glycol; polypropylene; and high-impact polystyrene. Suitability of a filament was verified using the Oddy test by detecting the action of volatile pollutants released from the filaments. The morphological and color changes were observed after allowing them to degrade under the exposure of UV radiation. The samples were then analyzed using Fourier-transform infrared spectroscopy. In addition, gas chromatography-mass spectroscopy technique was applied to complete the characterization of the printed filaments. Findings Materials investigated are suitable for restoration purposes ensuring long-term stability. Rapid prototyping using FDM is appropriate for restoring sensitive archaeological objects allowing reconstruction of parts and decreasing risk while manipulating delicate artifacts. Originality/value Rapid prototyping using FDM was chosen for the restoration of a fragile and sensitive archaeological glass bowl from Manises Ceramic Museum.

scholarly journals COVID-19 and a novel initiative to improve safety by 3D printing personal protective equipment parts from computed tomography

2020 ◽  
Author(s):  
John Coté ◽  
John Haggstrom ◽  
Ranuga Vivkanandan ◽  
Kristin Ann Coté ◽  
Daniel Real ◽  
...  
Keyword(s):  
Computed Tomography ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Future Research ◽  
Short Supply ◽  
Fused Deposition ◽  
Electronic Caliper ◽  
3D Printed ◽  
Original Part ◽  
Improved Accuracy

Abstract Background Powered air-purifying respirators are in short supply and can break down with extended use. Replacement parts can become hard to acquire. The aim of this study was to create an innovative quality improvement proof of concept using rapid prototyping. Methods Here we report three cases of 3D printed powered air-purifying respirator parts. 3D printing was performed on all parts using fused deposition modeling with standard polylactic acid, in the same way that presurgical models would be created. Measurements using an electronic caliper as well as CT scans were used to compare an original part to its corresponding 3D printed parts for accuracy. Results Electronic caliper and computed tomography measurements both showed accuracy consistant with current published norms. Conclusions Ultimately, there will be questions surrounding intellectual property, effectiveness and potential long-term safety for these types of 3D printed parts. Future research should look into the addition of specific nanoparticles from the position of cost, efficacy, safety and improved accuracy.

scholarly journals Influence of torsion on the structure of machine elements made of polymeric materials by 3D printing

Polimery ◽  
2021 ◽  
Vol 66 (5) ◽  
Author(s):  
Mariusz Dębski ◽  
Marek Magniszewski ◽  
Jacek Bernaczek ◽  
Łukasz Przeszłowski ◽  
Małgorzata Gontarz ◽  
...  
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Polymeric Materials ◽  
Torsion Test ◽  
Fused Filament Fabrication ◽  
Fused Deposition ◽  
Machine Elements ◽  
Deposition Modeling ◽  
Printing Direction

In this work, on the example of a spline connection, the effect of 3D printing on the structure of machine elements made of polymeric materials after a torsion test was investigated. A clear influence of the type of polymer and the printing direction in the applied incremental technology [FFF (Fused Filament Fabrication) also known as FDM (Fused Deposition Modeling)] on the structure of the obtained elements was observed.

3D DESIGN AND PRINTING OF CUSTOM-FIT FINGER SPLINT

2018 ◽  
Vol 30 (05) ◽  
pp. 1850032
Author(s):  
R. Swetha Arulmozhi ◽  
Mahima Vaidya ◽  
M. G. Poojalakshmi ◽  
D. Ashok Kumar ◽  
K. Anuraag
Keyword(s):  
Rheumatoid Arthritis ◽  
3D Printing ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Acrylonitrile Butadiene Styrene ◽  
Future Research ◽  
3D Printer ◽  
3D Design ◽  
Fused Deposition ◽  
Three Dimensional Modeling

Finger deformities are a major concern among the Indian population, where the increase of risk factors are higher for people suffering from Rheumatoid Arthritis. The deformities hinder the movements in the finger, affecting their day to day activities. Finger splint is a device which is used to support and correct this deformity in order to improve function. Three-dimensional modeling and 3D printing techniques are the standard measures used. The proposed methodology involves 3D modeling which was done using Solidworks 2013, along with standard measurements taken from the patients with deformities due to Rheumatoid Arthritis. The measurements were obtained using a vernier caliper. The 3D printing was done using Fused Deposition Modeling (FDM) and the materials needed for the same are Acrylonitrile Butadiene Styrene (ABS) and flex Polylactic Acid (PLA). The 3D printer used for the same is Flashforge Dreamer 3D printer. The volunteers were fitted with the custom finger splint. The finger splint is light-weight, easy to maintain and clean, with an inventive design based on the finger deformity. It is comfortable and helps support the patients during daily activities. It serves as an easy slip-on. Since it is well-ventilated, swelling of the finger does not occur. Future research will focus on the correction of the deformity, in addition to the biomechanical aspect of finger deformities.

Biodegradable 3D Printed Polymer Microneedles for Transdermal Drug Delivery

2018 ◽  
Author(s):  
Michael A. Luzuriaga ◽  
Danielle R. Berry ◽  
John C. Reagan ◽  
Ronald A. Smaldone ◽  
Jeremiah J. Gassensmith
Keyword(s):  
Drug Delivery ◽  
3D Printing ◽  
Transdermal Drug Delivery ◽  
Fused Deposition Modeling ◽  
Fused Deposition ◽  
Modeling Software ◽  
Deposition Modeling ◽  
3D Printed ◽  
Microfabrication Technique ◽  
Mechanical Strengths

Biodegradable polymer microneedle (MN) arrays are an emerging class of transdermal drug delivery devices that promise a painless and sanitary alternative to syringes; however, prototyping bespoke needle architectures is expensive and requires production of new master templates. Here, we present a new microfabrication technique for MNs using fused deposition modeling (FDM) 3D printing using polylactic acid, an FDA approved, renewable, biodegradable, thermoplastic material. We show how this natural degradability can be exploited to overcome a key challenge of FDM 3D printing, in particular the low resolution of these printers. We improved the feature size of the printed parts significantly by developing a post fabrication chemical etching protocol, which allowed us to access tip sizes as small as 1 μm. With 3D modeling software, various MN shapes were designed and printed rapidly with custom needle density, length, and shape. Scanning electron microscopy confirmed that our method resulted in needle tip sizes in the range of 1 – 55 µm, which could successfully penetrate and break off into porcine skin. We have also shown that these MNs have comparable mechanical strengths to currently fabricated MNs and we further demonstrated how the swellability of PLA can be exploited to load small molecule drugs and how its degradability in skin can release those small molecules over time.

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