scholarly journals Terahertz Complex Refractive Index Properties of the Acrylonitrile Butadiene Styrene with Rice Husk Ash and Its Possible Applications to 3D Printing Technique

2021 ◽  
Author(s):  
HSIN-YI PENG ◽  
Chan Shan Yang ◽  
YI-AN WEI ◽  
YUN-CHI RUAN ◽  
YOUNG-CHOU Hsu ◽  
...  
Keyword(s):  
Refractive Index ◽  
3D Printing ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Complex Refractive Index ◽  
Acrylonitrile Butadiene Styrene ◽  
Index Properties ◽  
Printing Technique ◽  
3D Printing Technique ◽  
Butadiene Styrene

One layer at a time: the use of 3D printing in the fabrication of cadmium-free electron field shaping devices

2020 ◽  
pp. 1-6
Author(s):  
Michael J. Moore ◽  
Ronald Snelgrove ◽  
Johnson Darko ◽  
Ernest K. Osei
Keyword(s):  
3D Printing ◽  
Acrylonitrile Butadiene Styrene ◽  
Intensity Modulation ◽  
Field Size ◽  
Planning System ◽  
Treatment Planning System ◽  
Electron Field ◽  
3D Printed ◽  
3D Printing Technique ◽  
Butadiene Styrene

Abstract Introduction: Electron blocks are typically composed of a low melting point alloy (LMPA), which is poured into an insert frame containing a manually placed Styrofoam aperture negative used to define the desired field shape. Current implementations of the block fabrication process involve numerous steps which are subjective and prone to user error. Occasionally, bowing of the sides of the insert frame is observed, resulting in premature frame decommissioning. Recent works have investigated the feasibility of utilising 3D printing technology to replace the conventional electron block fabrication workflow; however, these approaches involved long print times, were not compatible with commonly used cadmium-free LMPAs, and did not address the problem of insert frame bowing. In this work, we sought to develop a new 3D printing technique that would remedy these issues. Materials and Methods: Electron cutout negatives and alignment jigs were printed using Acrylonitrile Butadiene Styrene, which does not warp at the high temperatures associated with molten cadmium-free alloys. The accuracy of the field shape produced by electron blocks fabricated using the 3D printed negatives was assessed using Gafchromic film and beam profiler measurements. As a proof-of-concept, electron blocks with off-axis apertures, as well as complex multi-aperture blocks to be used for passive electron beam intensity modulation, were also created. Results: Film and profiler measurements of field size were in excellent agreement with the values calculated using the Eclipse treatment planning system, showing less than a 1% difference in line profile full-width at half-maximum. The multi-aperture electron blocks produced fields with intensity modulation ≤3.2% of the theoretically predicted value. Use of the 3D printed alignment jig – which has contours designed to match those of the insert frame – was found to reduce the amount of frame bowing by factors of 1.8 and 2.1 in the lateral and superior–inferior directions, respectively. Conclusions: The 3D printed ABS negatives generated with our technique maintain their spatial accuracy even at the higher temperatures associated with cadmium-free LMPA. The negatives typically take between 1 and 2 hours to print and have a material cost of approximately $2 per patient.

scholarly journals STRUCTURAL APPLICATION OF 3D PRINTING TECHNOLOGIES: MECHANICAL PROPERTIES OF PRINTED POLYMERIC MATERIALS / KONSTRUKCINIS 3D SPAUSDINIMO TECHNOLOGIJŲ TAIKYMAS: SPAUSDINTŲ POLIMERINIŲ MEDŽIAGŲ MECHANINĖS SAVYBĖS

2018 ◽  
Vol 10 (0) ◽  
pp. 1-8 ◽  
Author(s):  
Olena Shkundalova ◽  
Arvydas Rimkus ◽  
Viktor Gribniak
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Polymeric Materials ◽  
Acrylonitrile Butadiene Styrene ◽  
Tensile Tests ◽  
Building Structures ◽  
Printing Technique ◽  
Printed Materials ◽  
Printing Direction ◽  
3D Printing Technique

Additive manufacturing and modern printing technologies using polymeric materials extend the limits of industrial production and encourage applying 3D printing technique in many fields. An item of any shape and size limited only by the printing pad of particular equipment can be reproduced from a variety of materials. Polymers is the object of this research. It is known that mechanical properties of the printed elements are closely related with the manufacturing technology and vary significantly depending on the chosen production parameters such as printing temperature, velocity, and infill density. Depending on the purpose, a particular type of polymer can be used in structural analysis. This work considers mechanical properties of four thermoplastic polymeric materials widely used for prototyping: polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), high impact polystyrene (HIPS), and polyethylene terephthalate (PETG). The study is focused on two fundamental mechanical characteristics, tensile strength and modulus of elasticity, of the printed material. Dumbbell-shaped samples were made of the PLA, ABS, HIPS and PETG polymers using 3D printing technique with the same filling density (≈ 20%) of the entry level. The tensile tests were carried out in Laboratory of Innovative Building Structures at Vilnius Gediminas Technical University. The predominant effect of the printing direction on the mechanical properties of the printed materials was demonstrated in this study. The corresponding experimental characteristics are presented in the manuscript. Santrauka Modernūs gamybos procesai ir spausdinimo technologijos, naudojant polimerines medžiagas, plečia pramoninės gamybos ribas bei skatina taikyti 3D spausdinimo technologijas daugelyje sričių. Tokios technologijos leidžia gaminti bet kokios formos elementus iš įvairių medžiagų, o jų dydį lemia tik naudojamos spausdinimo įrangos galimybės. Pagrindinis šio tyrimo objektas – polimerinės medžiagos. Spausdintų elementų iš polimerinių medžiagų mechaninės savybės glaudžiai siejamos su gamybos technologija ir gali stipriai varijuoti keičiant gamybos proceso parametrus – spausdinimo temperatūrą, greitį, užpildo tankį. Polimero tipas kartu su jo mechaninėmis savybėmis parenkamas atsižvelgiant į konstrukcinį uždavinį. Šiame darbe nagrinėjamos plačiai prototipų gamyboje taikomų termoplastinių polimerinių medžiagų – polietileno rūgšties (PLA), akrilonitrilo butadieno stireno (ABS), polistireno (HIPS) ir polietileno tereftalato (PETG) – mechaninės savybės. Tyrime dėmesys skiriamas dviem pagrindinėms mechaninėms medžiagų charakteristikoms – tempiamajam stipriui ir tamprumo moduliui. Taikant 3D spausdinimo technologiją buvo pagaminti kaulo formos bandiniai iš PLA, ABS, HIPS ir PETG medžiagų. Bandinių užpildo tankis siekė ≈ 20 % paviršiaus spausdinimo sluoksnio tankio. Elementų tempimo bandymai atlikti Inovatyvių statybinių konstrukcijų laboratorijoje Vilniaus Gedimino technikos universitete. Šiame tyrime buvo parodyta spausdinimo krypties įtaka spausdintų medžiagų mechaninėms savybėms. Taip pat pateiktos eksperimentiškai nustatytos polimerinių medžiagų mechaninės savybės.

scholarly journals Fabrication of Porous Hydrogenation Catalysts by a Selective Laser Sintering 3D Printing Technique

ACS Omega ◽  
2019 ◽  
Vol 4 (7) ◽  
pp. 12012-12017 ◽  
Author(s):  
Elmeri Lahtinen ◽  
Lotta Turunen ◽  
Mikko M. Hänninen ◽  
Kalle Kolari ◽  
Heikki M. Tuononen ◽  
...  
Keyword(s):  
3D Printing ◽  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Hydrogenation Catalysts ◽  
Printing Technique ◽  
3D Printing Technique

scholarly journals Electromechanical Assessment and Induced Temperature Measurement of Carbon Fiber Tows under Tensile Condition

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4234
Author(s):  
Samir Mekid ◽  
Hammam Daraghma ◽  
Salem Bashmal
Keyword(s):  
Carbon Fiber ◽  
3D Printing ◽  
Tensile Test ◽  
Thermal Characteristics ◽  
Acrylonitrile Butadiene Styrene ◽  
Break Point ◽  
Host Material ◽  
Special Focus ◽  
Host Materials ◽  
Butadiene Styrene

The paper presents an investigation and analysis of the electromechanical and thermal characteristics of the carbon fiber alone as single tow and embedded in host materials such as polymer e.g., acrylonitrile butadiene styrene (ABS) using 3D printing. While carbon fibers can partially reinforce the structure, they can act as sensors to monitor the structural health of the host material. The piezo-resistive behavior was examined without any pretreatment of the carbon fiber under tensile test in both cases. Special focus on the filaments clamping types and their effects was observed. An auxetic behavior was exhibited; otherwise, the free part shows elastic and yielding ranges with break point at high resistance. An induced temperature of the carbon fiber was measured during the tensile test to show low variation. The carbon fiber can provide strength contribution to the host material depending on the percentage of filling the material in 3D printing. The relative variation of the electrical resistance increases by 400% while embedded in the host material, but decreases as the tows filament density increases from 1 to 12 K.

Combustion of toluene over cobalt-modified MFI zeolite dispersed on monolith produced using 3D printing technique

2020 ◽  
Author(s):  
Anna Rokicińska ◽  
Marek Drozdek ◽  
Elżbieta Bogdan ◽  
Adam Węgrzynowicz ◽  
Piotr Michorczyk ◽  
...  
Keyword(s):  
3D Printing ◽  
Mfi Zeolite ◽  
Printing Technique ◽  
3D Printing Technique

scholarly journals Production of ERCP training model using a 3D printing technique (with video)

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Chang-Il Kwon ◽  
Yeonsun Shin ◽  
Jaeok Hong ◽  
Minje Im ◽  
Guk Bae Kim ◽  
...  
Keyword(s):  
3D Printing ◽  
Training Model ◽  
Printing Technique ◽  
3D Printing Technique
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