Nickel–titanium shape memory alloy-actuated thermal overload relay system design

Dilibal, Savaş; Sahin, Haydar; Dursun, Erkan; Engeberg, Erik D.

doi:10.1007/s00202-016-0458-2

Cited by 12 publications

(6 citation statements)

References 22 publications

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“…The unique features of nitinol endodontic tools, known as shape memory and superelasticity (Figure 5b), are essential, and are determined by the unidirectional shape memory effect and the superelasticity and bidirectional shape memory effect [218,[244][245][246][247][248]. Thermoelasticity reversible martensitic transformation, in almost stoichiometric Ni-Ti alloys, even with a slight predominance of nickel [249], is responsible for these phenomena.…”

Section: Methods and Tools Of Root Canal Preparation In Endodontic Treatmentmentioning

confidence: 99%

Is Gutta-Percha Still the “Gold Standard” among Filling Materials in Endodontic Treatment?

Dobrzańska¹,

Dobrzański²,

Dobrzański³

et al. 2021

Processes

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The paper is an extensive monographic review of the literature, and also uses the results of the authors’ own experimental research illustrating the noticed developmental tendencies of the filling material based on gutta-percha. The whole body of literature proves the correctness of the research thesis that this material is the best currently that can be used in endodontics. Caries is one of the most common global infectious diseases. Since the dawn of humankind, the consequence of the disease has been the loss of dentition over time through dental extractions. Both tooth caries and tooth loss cause numerous complications and systemic diseases, which have a serious impact on insurance systems and on the well-being, quality, and length of human life. Endodontic treatment, which has been developing since 1836, is an alternative to tooth extraction. Based on an extensive literature review, the methodology of qualifying patients for endodontic treatment was analyzed. The importance of selecting filling material and techniques for the development and obturation of the root canal during endodontic treatment was described. Particular attention was paid to the materials science aspects and the sequence of phase transformations and precipitation processes, as well as the need to ensure the stoichiometric chemical composition of Ni–Ti alloys, and the vacuum metallurgical processes and material processing technologies for the effects of shape memory and superelasticity, which determine the suitability of tools made of this alloy for endodontic purposes. The phenomena accompanying the sterilization of such tools, limiting the relatively small number of times of their use, play an important role. The methods of root canal preparation and obturation methods through cold side condensation and thermoplastic methods, including the most modern of them, the thermo-hydraulic condensation (THC) technique, were analyzed. An important element of the research hypothesis was to prove the assumption that to optimize the technology of development and obturation of root canals, tests of filling effectiveness are identified by the density and size of the gaps between the root canal wall, and the filling methods used and devices appropriate for material research, using mainly microscopy such as light stereoscopic (LSM) and scanning electron (SEM). The most beneficial preparations were obtained by making a longitudinal breakthrough of 48 natural human teeth, extracted for medical reasons, different from caries, with compliance with all ethical principles in this field. The teeth were prepared using various methods and filled with multiple obturation techniques, using a virtual selection of experimental variants. The breakthroughs were made in liquid nitrogen after a one-sided incision with a narrow gap created by a diamond disc using a materialographic cutter. The best effectiveness of the root canal filling was ensured by the technology of preparing the root canals with K3 rotary nitinol tools and filling the teeth with the THC thermoplastic method using the System B and Obtura III devices with studs and pellets of filling material based on gutta-percha after covering the root canal walls with a thin layer of AH Plus sealant. In this way, the research thesis was confirmed.

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Section: Methods and Tools Of Root Canal Preparation In Endodontic Treatmentmentioning

confidence: 99%

Is Gutta-Percha Still the “Gold Standard” among Filling Materials in Endodontic Treatment?

Dobrzańska¹,

Dobrzański²,

Dobrzański³

et al. 2021

Processes

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“…Son yıllarda elde edilen teknolojik gelişmeler mekanik sistem, mekanizma tekniği ile mekatronik sistemlerin gelişimini hızlandırmıştır [1][2][3][4]. Birçok mühendislik alanında daha hafif, daha dayanıklı ve daha az yer kaplayan, yüksek hareket kabiliyetine sahip mekanizmalara ihtiyaç artmıştır [5][6].…”

Section: Introductionunclassified

Makas-Mafsal Mekani̇zma Tekni̇ği̇ Kullanilarak İki̇ Serbestli̇k Dereceli̇ Kablolu Radyal Makas Si̇stemi̇ Tasarimi Ve Eklemeli̇ İmalat Yöntemi̇ İle Üreti̇mi̇

Sapmaz

Dilibal

2020

International Journal of 3D Printing Technologies and Digital Industry

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Scissor-joint mechanisms with two or higher degrees of freedom are actively used in many machines, especially industrial robots. Novel designs are being tried for aesthetics and efficiency in technological developments. In scissor-joint mechanisms, force transmission is mostly carried out by piston, cable and spring systems. In this study, foldable scissor mechanism design with radial motion was built. It is aimed to produce scissor mechanisms with two degrees of freedom that can be converted into concave or convex shapes via cables. The topological optimization of the mechanism design was done by using the Autodesk Fusion 360 design program. The production of the designed model was achieved by using the additive manufacturing technology. The final scissor mechanism was obtained by integrating the produced parts. Mechanical system related problems arising in the mechanism after manufacturing were solved by making revisions on the design. Comparisons were made on two different prototypes produced. Additionally, the analytical solution of the obtained system is compared with the experimental results.

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“…Teknolojik gelişmeler havacılık sektöründe kullanılan ileri mühendislik malzemelerinin imalatını kolaylaştırarak [1][2], mekanik özelliklerinin geliştirilmesini [3][4] ve uygulama alanlarının yaygınlaştırılmasını [5][6][7] sağlamıştır. Özellikle, parça üzerinden malzeme azaltarak yapılan talaşlı imalat ve malzeme üzerine katmanlar eklenerek elde edilen katmanlı imalat yöntemleri kullanılarak geliştirilen yeni nesil kompozit malzemeler, havacılık sektöründe kullanılan hava araçlarının kanat ve gövde yapıları başta olmak üzere tüm araç yapısında kullanılır hale gelmiştir [8].…”

Section: Introductionunclassified

Havacilik Alaninda Kullanilan Karbon Prepreg Kompozi̇t Malzemeleri̇n Talaşli İmalatini Etki̇leyen Paremetreleri̇n İncelenmesi̇

Gaga

Dilibal

2020

International Journal of 3D Printing Technologies and Digital Industry

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Fiber takviyeli kompozit malzemelerin yüksek mekanik özellikleri, hafifliği ve çevresel faktörlere gösterdikleri dayanım nedeniyle endüstride kullanım alanları artmaktadır. Kalıplar üzerinde farklı üretim yöntemleri ile üretitilen kompozitler, kalıplardan çıkartıldıktan sonra geleneksel talaşlı imalat yöntemlerinden farklı bir şekilde işlenirler. Şekil verme işlemleri kalıpta tamamlanmış olan kompozit malzemelere son şeklini vermek için frezeleme işlemleri uygulanır. Çalışma sırasında CNC tezgâhta sırasıyla 3 ağızlı karbür takım, 4 ağızlı Ti-Al kaplamalı karbür takım ve 7 ağızlı Ti-Al kaplamalı karbür takım kullanılmıştır. Takımlar ile birlikte CNC tezgâhta dönme devri olarak 1000, 2000 ve 3000 dev/dk, ilerleme olarak ise 100, 150 ve 200 mm/dk kullanılmıştır. Yapılan deneysel çalışmalar sonucunda malzeme yüzey pürüzlülük değerleri, deformasyon faktörü değerleri ve talaşlı imalatın yapıldığı CNC tezgâhtan alınan kuvvet değerleri ile birlikte grafikler yardımıyla hangi parametrelerin en iyi sonuç verdiği karşılaştırmalı olarak incelenmiştir. Deneysel çalışmalarda ağız sayısı arttıkça yüzey pürüzlülüğü, deformasyon faktörü ve kesme kuvveti değerleri azaldığı ve devir arttıkça yüzey pürüzlülüğü, deformasyon faktörü ve kesme kuvveti değerleri azaldığı tespit edilmiştir. İlerleme hızı arttıkça deformasyon faktörü ve kesme kuvveti değerleri artmış, yüzey pürüzlülüğü değeri ise azalmıştır.

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Nickel–titanium shape memory alloy-actuated thermal overload relay system design

Cited by 12 publications

References 22 publications

Is Gutta-Percha Still the “Gold Standard” among Filling Materials in Endodontic Treatment?

Is Gutta-Percha Still the “Gold Standard” among Filling Materials in Endodontic Treatment?

Makas-Mafsal Mekani̇zma Tekni̇ği̇ Kullanilarak İki̇ Serbestli̇k Dereceli̇ Kablolu Radyal Makas Si̇stemi̇ Tasarimi Ve Eklemeli̇ İmalat Yöntemi̇ İle Üreti̇mi̇

Havacilik Alaninda Kullanilan Karbon Prepreg Kompozi̇t Malzemeleri̇n Talaşli İmalatini Etki̇leyen Paremetreleri̇n İncelenmesi̇

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