Dissertations / Theses on the topic '3D printing model'
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Pavlyuk, M. O. "3D printers and printing." Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/45447.
Full textElander, Sofia, and Elin Bolmstad. "Byggnadsmodellers anpassning inför 3D-utskift & dess användning." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Byggnadsteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-30502.
Full textPurpose: To investigate how digital 3D models should be adapted to enable 3D printing for use in the construction process in its various stages. Method: A case study is conducted with an existing digital 3D-model where interviews and action research is used as a data collection method. The empirical data are compared and analyzed with the theoretical framework developed through literature studies. Findings: A physical 3D model can be used at several stages in the construction process, mainly in idea development stages, the production stage and throughout the process as a communication tool and for advertising/sales/presentation for increased understanding. Prior to printing, all parts of the building should be solid, details should be erased depending on the scale used and components should consist of the same material. Implications: Based on interviews with people with varying knowledge and experience within the subject, it is important to take into consideration the fact that the proposals on the fields of use may not be enforceable in reality since they are requests. Despite this, the use of physical 3D models can be recommended in several construction phases of the process for greater understanding and better communication, which is corroborated by the theoretical framework. Adaptions of a digital model require a digital 3D model as a prerequisite and a certain experience of 3D design. Limitations: Since this study is a case study conducted in a specific case, knowledge and recommendations cannot be generalized statistically to other types of buildings. However, with small adjustments, this study can be implemented in similar projects. Due to the fact that the study is qualitative with a limited number of interviewees, there is a possibility of a different result if the execution occurred with other conditions. Keywords: BIM model, physical building model, 3D model, 3D printer, 3D printing
Bouchal, Petr. "Vývoj 3D FDM tiskárny implementace na trh." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241863.
Full textSodomka, Petr. "Simulace vlivů vyhřívané podložky na tisknutý model u 3D tiskárny." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221091.
Full textLi, Xin. "Building a Business Model to Increase Funding for Karlskrona Makerspace." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11510.
Full textOnyeako, Isidore. "Resolution-aware Slicing of CAD Data for 3D Printing." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34303.
Full textMadeleine, Wedlund, and Bergman Jonathan. "Decision support model for selecting additive or subtractive manufacturing." Thesis, Högskolan i Gävle, Maskinteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-26996.
Full textAdditiv tillverkning (AM), eller 3D-printing, är en tillverkningsmetod där komponenter produceras genom att succesivt addera material till produkten lagervis, till skillnad från skärande bearbetning där material subtraheras från ett arbetsstycke. Det finns fördelar och nackdelar med respektive metod och det kan vara ett komplext problem att avgöra när den ena metoden är att föredra framför den andra. Syftet med denna studie är att utveckla en beslutstödjande modell (DSM) som hjälper användaren välja lämplig metod med avseende på produktionskostnader. Information inhämtas genom en litteraturstudie samt intervjuer med personer som arbetar med AM och skärande bearbetning. Modellen tar hänsyn till material, storlek, tider, geometrisk komplexitet, efterbearbetning och miljöeffekter. Den beslutstödjande modellen skapades i Microsoft Excel. Skillnaden i pris mellan respektive tillverkningsmetod beroende på antal och komplexitet jämfördes mot litteraturstudien. Modellen för AM verifieras med hjälp av kostnadskalkyler från Sandvik Additive Manufacturing. Felmarginalen är förhållandevis låg på cirka två till sex procent när spillmaterial inte tas hänsyn till. Tyvärr har modellen för skärande bearbetning inte verifieras på grund av en brist på data, vilket därför rekommenderas som fortsatt arbete. Slutsatsen är att AM inte kommer ersätta någon nuvarande tillverkningsmetod. Det är dock ett bra komplement till metallindustrin eftersom små, komplexa komponenter med få toleranskrav gynnas av AM. En undersökning över nuvarande tjänster relaterat till studien genomfördes med ambitionen att utreda om den beslutstödjande modellen kompletterar dessa. Resultatet av undersökningen visar att medan det finns många konsulttjänster som hjälper ett företag implementera AM så är det få som erbjuder någon form av mjukvara. Gällande frågan om AM är lönsam för vissa produkter så var det bara en mjukvara som kunde besvara den, dock utan att visa några kostnader. Den beslutstödjande modellen framtagen i denna studie fyller därmed en funktion bland nuvarande tjänster och mjukvaror.
Yurie, Hirofumi. "The efficacy of a scaffold-free Bio 3D conduit developed from human fibroblasts on peripheral nerve regeneration in a rat sciatic nerve model." Kyoto University, 2019. http://hdl.handle.net/2433/242407.
Full textKuthe, Sudhanshu. "Multimaterial 3D Printing of a mechanically representative aortic model for the testing of novel biomedical implants." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260281.
Full textAortastenos är en hjärtsjukdom som får mycket uppmärksamhet och kräver kirurgi på grund av dess katastrofala komplikationer. Den allvarligaste komplikationen av aortastenos är hjärtinfarkt och resulterande hjärtstopp. Transcatheter Aortic Valve Replacement är en kardiovaskulär intervention som erbjuds för patienter med aortastenos. Denna typ av hjärtkirurgi är komplex och kan orsaka livshotande situationer för patienten om något går snett under operationen. Det är därför viktigt för kirurgen att kunna planera ingreppet innan han eller hon utför själva operationen för att minimera fara för patienten. Denna detaljerade studie ämnar utveckla och förbättra det kirurgiska verktyget för preoperativ planering av Transcatheter Aortic Valve Replacement genom 3D- tryckning. Forskningsarbetet kommer att ge kardiologer ett nytt sätt att förstå patientens hjärta i detalj och ett ökat förtroende för att träna på ingreppet på förhand. Datortomografibilder behandlades med hjälp av en bildsegmentationsprogramvara för att kunna skapa en anatomiskt korrekt kopia av patientens hjärta och tillhörande kärl. Genom att applicera material-vetenskapslära kan ett nytt kompositmaterial utvecklas med exakt samma mekaniska egenskaper som naturlig aortavävnad. Den mest moderna 3D-trycktekniken användes sedan för att producera en patientspecifik aorta. En artificiell aortaklaff placerades i den nyproducerade aortamodellen och tester visade en perfekt matchning utan läckage.
Berggren, Marcus. "EVALUATION OF ADDITIVE MANUFACTURINGSCALABILITY : Optimization model development for understanding the problem of Industrial 3D-printing production." Thesis, Blekinge Tekniska Högskola, Institutionen för industriell ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18890.
Full textCucher, Daniel Jeremy. "Micronutrient-Enhanced Hyperthermic Intraperitoneal Chemotherapy for Treatment of Peritoneal Metastasis: A Novel Experimental Design." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/560615.
Full textMomotenko, Ruslana, Artem Terzi, and Yuryi Vlasenko. "Preparation of geometric data for 3D prototyping." Thesis, National aviation university, 2021. https://er.nau.edu.ua/handle/NAU/52827.
Full textDespite the presence of high-tech CAD/CAM/CAE-systems, the problem of exchanging engineering data, primarily the structural elements of models, remains at this time not fully resolved. Both open data formats, such as STEP, IGES, etc., and polygonal STL formats, etc., do not solve the problem. Of course, these problems increase as the complexity of product models grows, but they also exist when using 3D prototyping technologies.
Незважаючи на наявність високотехнологічних CAD/CAM/CAE-систем, проблема обміну інженерними даними, насамперед структурними елементами моделей, залишається досі не повністю вирішеною. Як відкриті формати даних, такі як STEP, IGES тощо, так і багатокутні формати STL тощо, не вирішують проблему. Звичайно, ці проблеми зростають із зростанням складності моделей продуктів, але вони також існують при використанні технологій 3D-прототипування.
Correia, Rodrigo Emanuel de Almeida. "De que forma estão os retalhistas a incorporar aplicações 3D no seu modelo de negócio? Caso de estudo." Master's thesis, Instituto Superior de Economia e Gestão, 2019. http://hdl.handle.net/10400.5/19203.
Full textCom os recentes desenvolvimentos tecnológicos cada vez de ciclos mais reduzidos aliados a uma incessante busca pela inovação, as empresas necessitam de tomar decisões que as permita distanciar-se e ao mesmo tempo diferenciar-se da concorrência. A tecnologia de impressão 3D é um tema cada vez mais discutido ao longo dos últimos anos pelas suas características promissoras face à manufatura tradicional, em grande parte potenciadas pelos avanços tecnológicos referidos anteriormente. No entanto, poucos estudos existem sobre a sua aplicação em outros contextos empresariais, como o caso do contexto retalhista. Ainda que existam alguns estudos abrangendo as aplicações da tecnologia em determinadas fases da cadeia de valor de uma empresa, são desconhecidos estudos que permitam analisar a impressão 3D no contexto retalhista na forma de serviço. A presente investigação pretende evidenciar as diferenças existentes no modelo de negócio de uma empresa retalhista antes e depois da implementação da tecnologia de impressão 3D. Para esse efeito, utilizou-se um modelo de análise que permitiu contrastar as diferenças ao nível do modelo de negócio e ao mesmo tempo equiparar os resultados com a literatura encontrada sobre o tema. Segundo os dados analisados, é possível chegar à conclusão de que a impressão 3D permitiu reestruturar o modelo de negócio existente na empresa de forma positiva, alterando todas as componentes que o compõem, permitindo também obter conclusões relativamente à sua viabilidade em contexto nacional.
With the recent technological developments in ever-shrinking cycles coupled with a relentless pursuit for innovation, companies need to make decisions that allow them to distance themselves while differing from the competition. 3D printing technology has been a subject that has been increasingly discussed over the last few years for its promising characteristics compared to traditional manufacturing, greatly enhanced by the technological advances. However, few studies exist about its application in other business contexts, such as the retail context. Although there are some studies covering the applications of technology in certain phases of the value chain of a company, studies that analyze 3D printing in the retail context as a service are unknown. This research aims to highlight the differences in the business model of a retail company before and after the implementation of 3D printing technology. For this, we used an analysis model that allowed us to contrast the differences at the business model level and at the same time to match the results with the literature found on the subject. According to the data analyzed, it is possible to conclude that 3D printing made it possible to restructure the existing business model in the company in a positive way, changing all its components, and also allowing conclusions to be reached regarding its feasibility in a national context.
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Sobota, Matej. "Návrh funkčního modelu válcového dynamometru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401552.
Full textГордюк, Іван Васильович, Ivan Vasilyevich Gordyuk, Анжела Борисівна Зузяк, and Angela Borisivna Zuziak. "Особливості використання технології 3D-друку в будівництві." Thesis, Національний авіаційний університет, 2018. http://er.nau.edu.ua/handle/NAU/37949.
Full textCortella, Giacomo. "Development of a polyplexes-based miRNA delivery system in a 3D-bioplotted osteoarthritis cellular model." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25380/.
Full textSekerka, Vít. "Výroba dílů technologií DMLS a jejich porovnání s jinými konvenčními technologiemi z hlediska ekonomické náročnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229969.
Full textMartens, Robert. "Strategies for Adopting Additive Manufacturing Technology Into Business Models." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/5572.
Full textDejan, Movrin. "Optimizacija parametara postprocesiranja u tehnologiji vezivne 3D štampe." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104730&source=NDLTD&language=en.
Full textThe research presented in this thesis was aimed at forming a regressionmodel of the vacuum-assisted infiltration process in binder printingtechnology (3DP). The goal was to establish analytical relationship betweenkey infiltration technological parameters and tensile strength of infiltratedparts. The design of experiment and optimization of the infiltration processwas performed using a novel Definitive Screening Design method. Comparedto the literature results which pertain to tensile strength obtained usingcommercial powders, binders, and epoxy infiltrates, the optimized model ofvacuum-assisted infiltration yielded an increase of 23% in tensile strength.
Wampler, Dean Thomas. "Fluid Flow Characterization and in Silico Validation in a Rapid Prototyped Abdominal Aortic Aneurysm Model." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1805.
Full textChakraborty, Promita. "A Computational Framework for Interacting with Physical Molecular Models of the Polypeptide Chain." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/47932.
Full textPh. D.
Mahn, Uwe, Jörg Matthes, and Anna Maronek. "Topologieoptimierung und CAD- Modellaufbereitung für den 3D-Druck." Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21510.
Full textInnovative function-related component geometries in small quantities can be produced efficiently with different methods of additive, generative manufacturing, in a popular science known as 3D printing. For the designer of such components it also means to use other methods as usual. Component geometries optimized regarding to a target size can be calculated using topology optimization based on a FE model. While topology optimization has been known and established for a long time, the consistent use of a common database was often characterized by obstacles. In this article today's possibilities are shown with the FE system ANSYS and evaluated with regard of the efficient practical use.
Vašek, Vojtěch. "Použití modelů zhotovených technologii 3D tisku při výrobě odlitků do bentonitových forem na formovací lince." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319282.
Full textNun, Nicholas. "Improving Skin Wound Healing Using Functional Electrospun Wound Dressings and 3D Printed Tissue Engineering Constructs." University of Akron / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1617985844538101.
Full textLahr, Christoph Alexander. "Tissue-engineering humanised bone sarcoma models in rodents-a preclinical study platform for orthopaedic research." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/207759/1/Christoph%20Alexander_Lahr_Thesis.pdf.
Full textKnauer, Alexandra Mariel. "Fluid Flow Characterization and in Silico Validation in a Rapid Prototyped Aortic Arch Model." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1700.
Full textFurlanis, Silvia. "Towards a design approach for Wire-and-Arc Additively Manufactured stainless-steel elements." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24627/.
Full textXia, Liang. "Towards optimal design of multiscale nonlinear structures : reduced-order modeling approaches." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2230/document.
Full textHigh-performance heterogeneous materials have been increasingly used nowadays for their advantageous overall characteristics resulting in superior structural mechanical performance. The pronounced heterogeneities of materials have significant impact on the structural behavior that one needs to account for both material microscopic heterogeneities and constituent behaviors to achieve reliable structural designs. Meanwhile, the fast progress of material science and the latest development of 3D printing techniques make it possible to generate more innovative, lightweight, and structurally efficient designs through controlling the composition and the microstructure of material at the microscopic scale. In this thesis, we have made first attempts towards topology optimization design of multiscale nonlinear structures, including design of highly heterogeneous structures, material microstructural design, and simultaneous design of structure and materials. We have primarily developed a multiscale design framework, constituted of two key ingredients : multiscale modeling for structural performance simulation and topology optimization forstructural design. With regard to the first ingredient, we employ the first-order computational homogenization method FE2 to bridge structural and material scales. With regard to the second ingredient, we apply the method Bi-directional Evolutionary Structural Optimization (BESO) to perform topology optimization. In contrast to the conventional nonlinear design of homogeneous structures, this design framework provides an automatic design tool for nonlinear highly heterogeneous structures of which the underlying material model is governed directly by the realistic microstructural geometry and the microscopic constitutive laws. Note that the FE2 method is extremely expensive in terms of computing time and storage requirement. The dilemma of heavy computational burden is even more pronounced when it comes to topology optimization : not only is it required to solve the time-consuming multiscale problem once, but for many different realizations of the structural topology. Meanwhile we note that the optimization process requires multiple design loops involving similar or even repeated computations at the microscopic scale. For these reasons, we introduce to the design framework a third ingredient : reduced-order modeling (ROM). We develop an adaptive surrogate model using snapshot Proper Orthogonal Decomposition (POD) and Diffuse Approximation to substitute the microscopic solutions. The surrogate model is initially built by the first design iteration and updated adaptively in the subsequent design iterations. This surrogate model has shown promising performance in terms of reducing computing cost and modeling accuracy when applied to the design framework for nonlinear elastic cases. As for more severe material nonlinearity, we employ directly an established method potential based Reduced Basis Model Order Reduction (pRBMOR). The key idea of pRBMOR is to approximate the internal variables of the dissipative material by a precomputed reduced basis computed from snapshot POD. To drastically accelerate the computing procedure, pRBMOR has been implemented by parallelization on modern Graphics Processing Units (GPUs). The implementation of pRBMOR with GPU acceleration enables us to realize the design of multiscale elastoviscoplastic structures using the previously developed design framework inrealistic computing time and with affordable memory requirement. We have so far assumed a fixed material microstructure at the microscopic scale. The remaining part of the thesis is dedicated to simultaneous design of both macroscopic structure and microscopic materials. By the previously established multiscale design framework, we have topology variables and volume constraints defined at both scales
Musil, Jiří. "Hledání tvaru skořepinových konstrukcí." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-390254.
Full textGreenwood, Taylor Eugene. "Silicone 3D Printing Processes for Fabricating Synthetic, Self-Oscillating Vocal Fold Models." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8395.
Full textYerich, Andrew J. "Development of an Artificial Nose for the Study of Nanomaterials Deposition in Nasal Olfactory Region." Miami University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=miami151187266403964.
Full textShanmugham, Chetiyar Krishna Kumar, and Venkata Sri Sai Sumanth Galla. "Measurement of Surface Defects in 3D Printed Models." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-32487.
Full textJiao, Hankun, I. M. Perepelitsa, I. M. Nakonecniy, Я. В. Носова, and M. Y. Tymkovych. "Development of natural models of human lungs by means of rapid prototyping." Thesis, RS Global S. z O.O, 2019. http://openarchive.nure.ua/handle/document/8634.
Full textFitzgerald, Martha Moore. "Development and 3D Printing of Interpenetrating Network Hydrogel Materials for use as Tissue-Mimetic Models." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1430488189.
Full textRomero, Ryan Gregory. "Development and Analysis of 3D-Printed Synthetic Vocal Fold Models." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7727.
Full textBaecher, Moritz Niklaus. "From Digital to Physical: Computational Aspects of 3D Manufacturing." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11149.
Full textEngineering and Applied Sciences
Yao, Miaojun. "3D Printable Designs of Rigid and Deformable Models." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1502906675481174.
Full textCreff, Justine. "Etude des mécanismes impliqués dans le contrôle du destin des cellules souches intestinales et développement d'un modèle 3D d'épithélium intestinal." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30228.
Full textThe small intestine is a complex tissue with a crypt/villus architecture and high tissue polarity. Intestinal stem cells are located at the crypt bottom where they proliferate and differentiate while they migrate upward to the top of villi, allowing the constant renewal of the entire intestinal epithelium every 3 to 5 days. Compartmentalization in the crypt plays a key role in stem cell protection and maintenance, and this is supported by the microenvironment and tissue organization. The balance between stem cell proliferation and differentiation is necessary to maintain tissue integrity, and disruption of this balance leads to developmental anomalies and malignant transformation. Studying the mechanisms governing intestinal stem cells maintenance is therefore crucial to understand tissue homeostasis. p57Kip2 is a cyclin/CDKs inhibitor and a putative tumor suppressor. p57 is also the gene the most frequently mutated or silenced in Beckwith-Wiedemann syndrome (BWS), characterized by multiple developmental defects and tumor predisposition during childhood. Generation of knock-in mice expressing a mutant p57 (p57CK-) that cannot bind to cyclins and CDKs demonstrated that p57 exerts CDKs independent functions during development and that BWS is not entirely caused by loss of CDKs inhibition due to p57 inactivation. The first aim of this project was to investigate the role of p57 in the maintenance of intestinal stem cells. Two population of stem cells have been described in the intestine: proliferative crypt base columnar cells (CBCs), responsible of the constant renewal of the epithelium, and quiescent +4 stem cells, activated during regeneration after tissue damage. Our data shows that p57 is involved in maintaining the quiescence of the +4 reserve stem cells in a CDK independent manner. Indeed, p57KO mice exhibit an increased proliferation in the crypt caused by amplification of +4 stem cells and of the progenitor population (transit amplifying cells), while CBCs are not affected by loss of p57. Finally, our results show that p57 can inhibit Ascl2 transcriptional activity, and we identified new p57 partners that form this transcriptional repressor complex. This work could elucidate the role of p57 in intestinal tumorigenesis. The second aim of this project was to develop a new culture model to study intestinal stem cells. [...]
Martof, Ashley Nicole. "Analysis of Business Models for the Use of Additive Manufacturing for Maintenance and Sustainment." Youngstown State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1494940467559894.
Full textGarnault, Tristan. "Frittage par micro-ondes de céramiques mises en forme par impression 3D." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALI077.
Full textThis PhD thesis deals with the sintering by microwave heating of alumina and yttria doped zirconia ceramics, shaped by additive manufacturing (Robocasting). Microwave heating allows to apply short thermal cycles with a moderate energy cost in comparison with conventional heating method. The combination of 3D printing and microwave sintering is a complete processing route, suitable for shaping and densification of small series of complex parts, saving raw material, time and energy. The aim of this work is therefore to reliably couple these two processes by improving our understanding of microwave/matter interactions, and by developing regulation methods and adapted sintering devices.The methods of automatic regulation and temperature monitoring of microwave devices were first dealt with. The frequency instability of magnetron sources is an obstacle to the application of effective automatic control if it is not taken into account. Subsequently, the microwave coupling of alumina and zirconia was discussed. These two materials have a very different behaviour. Alumina, which is quasi-transparent, heats with difficulty under direct irradiation. Zirconia, on the other hand, has a behaviour that changes strongly with temperature, going from not very absorbent to reflective, making it difficult to control its direct heating. Taking into account the characteristics of microwave devices and the behaviour of materials, a method of assisted microwave heating is proposed, allowing the rapid and controlled sintering of parts with varied compositions and geometries. Complex parts have been successfully sintered using this process
Francisco, Luiz Angelo Valota. "Modelo computacional de descrição de projetos para impressão de biosistemas." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/8103.
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Currently, there are several studies directed to the manufacture of biosystems (biomaterials, living tissues or organs). These studies include several practice areas ranging from virtual representation of an organ or tissue to its biomanufacturing (bioprinting) itself. But for biomanufacturing a complex organ, it is still needed a long walk, because this process requires a very large wealth of information. Experiments to aid in surgical planning have been made based on medical image data and use of 3D printer rapid prototyping through STL specifications (STereoLitography). This work aims the study biomanufacturing processes of biomaterials, living tissues and organs aiming to establish the requirements for building a computer model to assist in the development of a project description framework for bioprinting living tissues and organs via STL specifications. This model was designed through research processes and parameters required for bioprinting of living tissues or organs resulting from the state of the art in this area and forms of representation in a computer model. For the evaluation of the model and the developed framework, an experiment was conducted where the data of a cartilage bioprinting experiment conducted by other authors were expressed through a bioprinting project.
Atualmente, existem vários estudos voltados para a fabricação de biosistemas (biomateriais, tecidos vivos ou órgãos). Esses estudos contemplam várias áreas de atuação que vão desde a representação virtual de um órgão ou tecido até a sua biofabricação (bioimpressão) propriamente dita. Porém, para a biofabricação de um órgão complexo, ainda é necessária uma longa caminhada, pois esse processo exige uma riqueza muito grande de informações. Experimentos para auxilio em planejamento cirúrgico têm sido feitos baseados em dados de imagens médicas e uso de impressoras 3D de prototipagem rápida, através de especificações STL (STereoLitography). Este trabalho, tem como objetivo, o estudo de processos de biofabricação de biomateriais, tecidos vivos e órgãos visando, estabelecer os requisitos necessários para a construção de um modelo computacional que auxilie no desenvolvimento de um framework de descrição de projetos para bioimpressão de tecidos vivos e órgãos por intermédio de especificações STL. Esse modelo foi concebido através da investigação de processos e parâmetros necessários para a bioimpressão de tecidos vivos ou órgãos, decorrentes do estado da arte nessa área e das formas de sua representação em um modelo computacional. Para a avaliação do modelo e do framework desenvolvido, foi realizado um experimento onde os dados de um experimento de bioimpressão de cartilagem realizado por outros autores foram expressados através de um projeto de bioimpressão.
Krimi, Imane. "Contribution au potentiel de la fabrication additive dans la construction : Proposition d’une formulation cimentaire imprimable." Thesis, Ecole centrale de Lille, 2017. http://www.theses.fr/2017ECLI0021.
Full textAdditive Manufacturing (3D printing) consists in building an object layer by layer following a 3D model. For this purpose an appropriate material, machine and model are needed. From Construction industry point of view, 3D printing is considered as a new building method. Since 2010, the use of 3D printing for construction has known a large evolution. More and more real construction projects are using this new technology. Some of these examples are Winsun in China, D-Shape in Italy, Contour Crafting in California or Apis Cor in Russia…etc.The work presented in this manuscript was conducted through an industrial PhD thesis (CIFRE) which was launched between “Ecole Centrale de Lille” and “Bouygues Construction” in 2015. The objective of this work was to study the potential of large scale 3D printing integration in the construction process and more precisely the development of a printable cement based mix design.The work is organized in three main parts.The first part was dedicated to 3D printing and cement based material as general concepts. Then their interactions were analyzed. The second part was devoted to the printable mix design. The printability was defined using three indicators: Extrudability, Buildability and layers adhesion. The third part was dedicated to check the printability of the proposed mix design. This work may be considered as a first approach to define a laboratory scale methodology for cement based materials printability testing. It is also a step to contribute to the development of construction 3D printers
Hawatmeh, Derar Fayez. "Three Dimensional Direct Print Additively Manufactured High-Q Microwave Filters and Embedded Antennas." Scholar Commons, 2018. http://scholarcommons.usf.edu/etd/7165.
Full textFenollosa, Artés Felip. "Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667421.
Full textLa presente tesis doctoral se ha centrado en el reto de conseguir, mediante Fabricación Aditiva (FA), modelos para ensayo quirúrgico, bajo la premisa que los equipos para obtenerlos tendrían que ser accesibles al ámbito hospitalario. El objetivo es facilitar la extensión del uso de modelos como herramienta de preparación de operaciones quirúrgicas, transformando la práctica médica actual de la misma manera que, en su momento, lo hicieron tecnologías como las que facilitaron el uso de radiografías. El motivo de utilizar FA, en lugar de tecnologías más tradicionales, es su capacidad de materializar de forma directa los datos digitales obtenidos de la anatomía del paciente mediante sistemas de escaneado tridimensional, haciendo posible la obtención de modelos personalizados. Los resultados se centran en la generación de nuevo conocimiento para conseguir equipamientos de impresión 3D multimateriales accesibles que permitan la obtención de modelos miméticos respecto a los tejidos vivos. Para facilitar la buscada extensión de la tecnología, se ha focalizado en las tecnologías de código abierto como la Fabricación por Hilo Fundido (FFF) y similares basadas en líquidos catalizables. Esta investigación se alinea dentro de la actividad de desarrollo de la FA en el CIM UPC, y en este ámbito concreto con la colaboración con el Hospital Sant Joan de Déu de Barcelona (HSJD). El primer bloque de la tesis incluye la descripción del estado del arte, detallando las tecnologías existentes y su aplicación al entorno médico. Se han establecido por primera vez unas bases de caracterización de los tejidos vivos – principalmente blandos – para dar apoyo a la selección de materiales que los puedan mimetizar en un proceso de FA, a efectos de mejorar la experiencia de ensayo de los cirujanos. El carácter rígido de los materiales mayoritariamente usados en impresión 3D los hace poco útiles para simular tumores y otras referencias anatómicas. De forma sucesiva, se tratan parámetros como la densidad, la viscoelasticidad, la caracterización de materiales blandos en la industria, el estudio del módulo elástico de tejidos blandos y vasos, la dureza de los mismos, y requerimientos como la esterilización de los modelos. El segundo bloque empieza explorando la impresión 3D mediante FFF. Se clasifican las variantes del proceso desde el punto de vista de la multimaterialidad, esencial para hacer modelos de ensayo quirúrgico, diferenciando entre soluciones multiboquilla y de mezcla en el cabezal. Se ha incluido el estudio de materiales (filamentos y líquidos) que serían más útiles para mimetizar tejidos blandos. Se constata como en los líquidos, en comparación con los filamentos, la complejidad del trabajo en procesos de FA es más elevada, y se determinan formas de imprimir materiales muy blandos. Para acabar, se exponen seis casos reales de colaboración con el HJSD, una selección de aquellos en los que el doctorando ha intervenido en los últimos años. El origen se encuentra en la dificultad del abordaje de operaciones de resección de tumores infantiles como el neuroblastoma, y en la iniciativa del Dr. Lucas Krauel. Finalmente, el Bloque 3 desarrolla numerosos conceptos (hasta 8), actividad completada a lo largo de los últimos cinco años con el apoyo de los medios del CIM UPC y de la actividad asociada a trabajos finales de estudios de estudiantes de la UPC, llegándose a materializar equipamientos experimentales para validarlos. La investigación amplia y sistemática al respecto hace que se esté más cerca de disponer de una solución de impresión 3D multimaterial de sobremesa. Se determina que la mejor vía de progreso es la de disponer de una pluralidad de cabezales independientes, a fin de capacitar la impresora 3D para integrar diversos conceptos estudiados, materializándose una posible solución. Para cerrar la tesis, se plantea cómo sería un equipamiento de impresión 3D para modelos de ensayo quirúrgico, a fin de servir de base para futuros desarrollos.
FONG, CHU CHEN, and 朱振逢. "Constructing Selection Model for 3D Printing System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/58269490926348549211.
Full text國立高雄應用科技大學
資訊管理系碩士在職專班
102
As historical literature were rarely themed in selection model of a 3D Printing System, and empirical model or a single information system has been the most selected perspective in practical field to evaluate the 3D Printing System at present, where such methods often failed to have an entire assessment in the complicated nature of 3D Print, plus that the evaluation index weights have not been completely equal. Therefore, this study proposed a four-phased selection model integrating literature and expert opinions; firstly, Phase I used success of DeLone information system as the base to develop prototype index; secondly, the deduced dimension of evaluation foundation was through a combination of the features of 3D Print and Technology Acceptance Model; thirdly, the Modified Delphi Method was utilized in the modification and simplification of dimension and index by experts; fourthly, a fuzzy consolidated selection mode was used to determine the evaluation index weights. Finally, the findings proposed five dimensions: System quality, information quality, service quality, Perceived ease-of-use and Perceived usefulness, with a total of 49 evaluation indexes and weights, along with provision of a case sample to illustrate the use of indexes and weights. Combined as above, this study anticipates being for references of a company’s process in the evaluation of a 3D Printing System.
Zavolodko, H., and N. Haidar. "3D Printing in Online Education." Thesis, 2020. https://openarchive.nure.ua/handle/document/17545.
Full textYU, CHEN-LIN, and 林育辰. "3D printing technology used in aircraft systems integration model." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/bqydx4.
Full text中華大學
機械工程學系
104
With 3D printing technology trends, the impact of today's industrial and market environment. This study was to create a "3D printing technology used in aircraft CAD integrated system." 3D printing technology distinct from traditional processing, from design to manufacturing only planning CAD design and CAM to make the desired object. As competition in the industry, can reduce the production cycle and meet customer needs is not easy, but 3D printing technology without creating a model program to make it the object of traditional processing can not finish, and reduces the time required to mold in the custom design can print out only do customers demand objects from CAD and fast delivery. 3D printing technology program is simple, but there will be printed on the flaws in the environmental impact of inadequate planning or CAM, is set by the integration of print with the best parameters combination of aircraft model object-oriented systems integration focus of the thesis. In this paper, using Fused Deposition Modeling (FDM) printing technology to print on the Delta 3D Printer, to give the object caused by flaws in the print order and provide a solution to make guidelines for the aircraft type and geometry to do to achieve effective integration of print.
Vale, Miguel Filipe Pereira de Menezes e. "A business model for an online 3D printing platform." Master's thesis, 2014. http://hdl.handle.net/10362/21443.
Full textThis paper presents the main findings and learning experiences from the Business Project conducted in the past 5 months. The project was made in collaboration with Berenschot, a Dutch consulting firm. The final outcome of the project included the presentation of the main critical success factors for online platforms in the 3D printing industry. In addition, as part of this Work Project, a deep analysis was performed to study the main barriers that those platforms face in the market and that ultimately can contribute to their failure.
CHUNG, YU-HAN, and 鐘宇涵. "Using 3D Printing Technology in Landscape Design Model Building." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/x795x2.
Full text聖約翰科技大學
機械與電腦輔助工程系碩士班
106
In addition to the requirement of comfortable living, modern people also require to improve the environmental aesthetics and landscape design of environmental spaces so that the public spaces outside buildings have good dynamic walking routes and visual perception. In the past, the landscape planning and design model was constructed manually and often took a lot of time where the landscape design planner can only communicate with customers through the computer graphics and situation simulation and therefore big discrepancy between the actual landscape entity and the expectation was often resulted after the completion of construction. In recent years, due to the rapid development of 3D printing technology, 3D printing technology is characteristic of high efficiency and low cost and is applied more and more widely. In this study, a part of the landscape design in the planning case of “Huangjinshi Area Landscape Construction Plan (Shihmen District) Phase II Project – Bid A” at Laomeili, Shihmen District Administration of New Taipei City was taken to explore the application of 3D printing technology to construct the landscape design and planning model to assist the communication between the landscape designer and owner. According to the study results, the completed landscape entity has actually reduced the expectation gap between the landscape designer and owner, which also helps to provide reference for the landscape designer in performing landscape design in the future. If the invisible parts of environment like terrain and topography, drainage system and soil and water conservation can be incorporated into the established model later, it is believed to be able to better meet the customer’s expectations on landscape design.
Tseng, Yi-Ching, and 曾以磬. "3D CAD model construction for bio-printing of human tissues." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/25195352138829386220.
Full text國立臺灣大學
機械工程學研究所
104
The purpose of this thesis is to develop computer-aided design (CAD) tools to construct 3D bio-printing models of human tissues from medical images. 3D tissue models can also be established by describing spatial shape of tissues with suitable mathematical parameters. The CT scan images of a human tissue, for example coronary artery, are first imported into a CAD software AutoCAD for digitizing 3D boundary points of the tissue. With 3D boundary points at the same elevation from two orthogonal views, a cross section with spline curve can be determined, and then a 3D model can be obtained by lofting cross sections at different elevation. CT scan images can also be used by medical image software for constructing stereolithography (STL) surface models, and the STL surface model is imported to AutoCAD to reconstruct 3D solid model by cross sections from surface model slicing contours at different elevation. For other tissue where CT scans are difficult to obtain, for example human cornea, the 3D model can be established from mathematical parameters that describe the spatial shape of a tissue. A parametric program is developed with a dialog box for specifying parameters such that 3D models constructed for each patient are different. Established 3D human tissue models are sent to 3D printers, and good prototypes are obtained. The results show that the 3D model construction method for human tissues are both fast and effective.