3D printed tensile and flexural prototypes of thermoplastic matrix reinforced with multi-materials: A statistical analysis

2020 ◽  
Author(s):  
Sudhir Kumar ◽  
Rupinder Singh ◽  
T.P. Singh ◽  
Ajay Batish
Keyword(s):  
Statistical Analysis ◽  
Thermoplastic Matrix ◽  
3D Printed

scholarly journals Manufacturing Of Aluminum Coating On 3D-Printed Onyx With Cold Spray Technology

2021 ◽  
Author(s):  
Roberta Della Gatta ◽  
Antonello Astarita ◽  
Domenico Borrelli ◽  
Antonio Caraviello ◽  
Francesco Delloro ◽  
...  
Keyword(s):  
Composite Materials ◽  
Cold Spray ◽  
Industrial Applications ◽  
Thin Metal Film ◽  
Temperature Sensitive ◽  
Fused Filament Fabrication ◽  
Aluminum Powders ◽  
Thermoplastic Matrix ◽  
Military Applications ◽  
3D Printed

Composite materials are widely used as main parts and structural components in different fields, especially for automotive and military applications. Although these materials supply different advantages comparing to the metals, their implementation in engineering applications is limited due to low electrical and thermal properties and low resistance to erosion. To enhance these above-mentioned properties, the metallization of composite materials by creating a thin metal film on their surface can be achieved. Among different coating deposition techniques, Cold Spray appears to be the most suitable one for the metallization of temperature-sensitive materials such as polymers and composites with a thermoplastic matrix. This process relies on kinetic energy for the formation of the coating rather than on thermal energy and consequent erosion and degradation of the polymer-based composite can be avoided. In the last years, a new method to produce composite materials, as known as Fused Filament Fabrication (FFF), has been developed for industrial applications. This technique consists of a 3D printing process that involves the thermal extrusion of thermoplastic polymer and fibers in the form of filaments from a heated mobile nozzle. The implementation of this new technique is leading to the manufacturing of customized composite materials for the cold spray application. In the presented experimental campaign, Onyx material is used as a substrate. This material is made of Nylon, a thermoplastic matrix, and chopped carbon fibers randomly dispersed in it. Aluminum powders were cold sprayed on the Onyx substrate with a low-pressure cold spray (LPCS) system. This study aims to investigate the possibility of the metalizing 3D-printed composite material by cold spray technology. For this purpose, optical and microscopical analyses are carried out. Based on the results, the feasibility of the process and the influence of the morphology of the substrate are discussed, and optimal spraying conditions are proposed.

scholarly journals Mechanical properties of 3D printed composites with ABS/ASA substrate and glass fiber inserts

2019 ◽  
Vol 290 ◽  
pp. 04002 ◽  
Author(s):  
Cătălin G. Amza ◽  
Aurelian Zapciu ◽  
Arnheiður Eyþórsdóttir ◽  
Auðbjörg Björnsdóttir ◽  
Jonathan Borg
Keyword(s):  
Glass Fiber ◽  
Axial Direction ◽  
Fiber Direction ◽  
Type I ◽  
Printing Process ◽  
Thermoplastic Matrix ◽  
Molded Parts ◽  
Raster Angle ◽  
Mesh Density ◽  
3D Printed

3D printed specimens (ASTM D638 Type I) were manufactured from ABS and ASA material via additive manufacturing through material extrusion 3D printing (ME3DP). During manufacturing, the printing process has been paused, pre-impregnated biaxial or uniaxial glass fiber mesh has been placed onto the ABS/ASA substrate and then the printing process has been resumed. The obtained composite specimens have been subjected to tensile strength testing and results have been compared to those of specimens printed from homogenous material. The influence of raster angle, glass fiber direction and mesh density on resulting toughness has also been analyzed. It was found that inserting uniaxial glass fiber increases toughness of specimens in the axial direction, with a drop in layer adhesion if biaxial fiber is used. Test specimens manufactured with 30 uniaxial fiber strands embedded in a 0o raster angle 3D printed thermoplastic matrix match mechanical characteristics of injection-molded parts. The maximum mesh density without leading to delamination is one layer of glass fiber every two layers of thermoplastic matrix.

scholarly journals Fused Filament Fabrication of Polymers and Continuous Fiber-Reinforced Polymer Composites: Advances in Structure Optimization and Health Monitoring

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 789
Author(s):  
Fatemeh Mashayekhi ◽  
Julien Bardon ◽  
Vincent Berthé ◽  
Henri Perrin ◽  
Stephan Westermann ◽  
...  
Keyword(s):  
Health Monitoring ◽  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Continuous Fiber ◽  
Fused Filament Fabrication ◽  
Thermoplastic Matrix ◽  
Fiber Reinforced Polymer Composites ◽  
3D Printed ◽  
Printed Materials ◽  
Monitoring Technologies

3D printed neat thermoplastic polymers (TPs) and continuous fiber-reinforced thermoplastic composites (CFRTPCs) by fused filament fabrication (FFF) are becoming attractive materials for numerous applications. However, the structure of these materials exhibits interfaces at different scales, engendering non-optimal mechanical properties. The first part of the review presents a description of these interfaces and highlights the different strategies to improve interfacial bonding. The actual knowledge on the structural aspects of the thermoplastic matrix is also summarized in this contribution with a focus on crystallization and orientation. The research to be tackled to further improve the structural properties of the 3D printed materials is identified. The second part of the review provides an overview of structural health monitoring technologies relying on the use of fiber Bragg grating sensors, strain gauge sensors and self-sensing. After a brief discussion on these three technologies, the needed research to further stimulate the development of FFF is identified. Finally, in the third part of this contribution the technology landscape of FFF processes for CFRTPCs is provided, including the future trends.

Investigations on 3D printed thermosetting and ceramic-reinforced recycled thermoplastic-based functional prototypes

2019 ◽  
pp. 089270571986462 ◽  
Author(s):  
Rupinder Singh ◽  
Ranvijay Kumar ◽  
Inderpreet Singh
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Surface Hardness ◽  
Acrylonitrile Butadiene Styrene ◽  
Experimental Investigations ◽  
Fused Deposition Modelling ◽  
Ceramic Particles ◽  
Fused Deposition ◽  
Thermoplastic Matrix ◽  
3D Printed

The 3D printing of thermoplastic polymers (both virgin and reinforced with metal/ceramic particles) has been widely explored in recent past with fused deposition modelling (FDM) process. But hitherto very little has been reported on 3D printing of thermoplastics polymers with reinforcement of thermosetting polymers and ceramic particles. This article is an extension of work reported on thermo-mechanical investigations on waste thermosetting polymer bakelite and ceramic (silicon carbide and aluminium oxide) as reinforcement in recycled acrylonitrile butadiene styrene (ABS) thermoplastic matrix for sustainability. The study reports the experimental investigations on mechanical (tensile), morphological, surface hardness and thermal stability analysis of 3D printed functional prototype as tensile specimen (as per ASTM D 638). In the present case study, it has been ascertained that composition/proportion of thermoplastic matrix has a significant role in controlling the mechanical properties, whereas other input process parameters of FDM are insignificant. The results of the study suggest that thermosetting and ceramic-reinforced ABS thermoplastic-based 3D printed parts have mechanical properties at par with unreinforced ABS.

scholarly journals Influence of the Printing Angle and Load Direction on Flexure Strength in 3D Printed Materials for Provisional Dental Restorations

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3376
Author(s):  
Paula Derban ◽  
Romeo Negrea ◽  
Mihai Rominu ◽  
Liviu Marsavina
Keyword(s):  
Statistical Analysis ◽  
Testing Machine ◽  
Load Direction ◽  
Flexure Strength ◽  
Three Point Bending ◽  
Dental Restorations ◽  
Frequent Use ◽  
Cad Cam ◽  
3D Printed ◽  
Printed Materials

The CAD/CAM techniques, especially additive manufacturing such as 3D printing, constitute an ever-growing part of obtaining different dental appliances and restorations. Of these, provisional restorations are of frequent use in daily dental practice and are the object of this study. Masticatory and parafunctional forces determine flexure on these prostheses. This study investigates the influence of the printing angle and loading direction of the applied force on the flexure strength of two commercially available printable resins—Detax Freeprint Temp and Nextdent MFH Vertex dental. Ten rectangular beam specimens printed at the angle of 0, 45 and 90 degrees were fabricated of each of these materials, with an addition of 10 at 0 degrees for the investigation of the load direction. Three-point bending tests were performed in a universal testing machine. Flexure strength, strain at break and Young’s modulus were determined and a statistical analysis was performed on the obtained data. According to the statistical analysis, the flexural strength has a significance dependence with respect to degrees of orientation, for both investigated materials.

Experimental Investigation of Alginate-Methylcellulose Composition and Printing Direction on Dimensional Accuracy of 3D Printed Constructs

2020 ◽  
Author(s):  
Ketan Thakare ◽  
Xingjian Wei ◽  
Laura Jerpseth ◽  
Zhijian Pei ◽  
Hongmin Qin
Keyword(s):  
Tissue Engineering ◽  
Experimental Investigation ◽  
Statistical Analysis ◽  
Measurement Data ◽  
Dimensional Accuracy ◽  
Significance Level ◽  
Width Measurement ◽  
3D Printed ◽  
Printing Direction

Abstract Bioprinting technology has a great potential in the fields of tissue engineering and regenerative medicine. In tissue engineering, for a bioprinted tissue to be successful in supporting regeneration of new tissue, it should morphologically mimic the native tissue in vivo. Therefore, the bioprinted tissue needs to be dimensionally accurate. In extrusion-based bioprinting, 3D printing process parameters and bioink properties affect dimensional accuracy of printed constructs. Currently, little information is available on effects of bioink composition and printing direction on dimensional accuracy of 3D printed constructs using alginate:methylcelluolose based bioink. In this study, strands were printed using four compositions of alginate:methylcellulose bioink and two printing directions. The four compositions of alginate:methylcellulose bioink were 1:1.5, 1:2, 1:2.5 and 1:3, and the two printing directions were vertical and horizontal. The statistical analysis of strand width measurement data revealed that while bioink composition has significant effect, printing direction does not affect the strand width of 3D printed constructs at the significance level of 0.05.

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