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Full-Text Articles in Mechanical Engineering
Maker: Redesign Of A Multipurpose Hardware Tool To Improve Its Functionality And Marketability, David Alexander, Vimal Viswanathan, Shraddha Sangelkar, Johnathan Moody
Maker: Redesign Of A Multipurpose Hardware Tool To Improve Its Functionality And Marketability, David Alexander, Vimal Viswanathan, Shraddha Sangelkar, Johnathan Moody
Faculty Publications, Mechanical Engineering
In this maker project, we redesigned a hardware tool that is primarily used by linemen working in power companies. At the top of the posts where they work, it is essential to have easily accessible and easy-to-use tools with firm grip. With the use of a multi-purpose product that combines the functionalities of many other common tools, the handling of the tools can be made easy. This maker project is conducted as a case study for a larger research study where the investigators developed a new set of guidelines for the development of multi-purpose products. Though multi-purpose products are very …
A Study On The Effects Of Example Familiarity And Modality On Design Fixation, Vimal Viswanathan, Megan Tomko, Julie Linsey
A Study On The Effects Of Example Familiarity And Modality On Design Fixation, Vimal Viswanathan, Megan Tomko, Julie Linsey
Faculty Publications, Mechanical Engineering
Design fixation is a factor that negatively influences the generation of novel design concepts (Jansson & Smith, 1991). When designers fixate, they tend to reproduce example features or features from their initial ideas. In order to mitigate design fixation, it is crucial to identify the factors that influence the extent of design fixation. This paper investigates two such factors: the modality of examples and the familiarity of designers with the example features. To investigate this, an experiment is conducted with mechanical engineering students who were asked to generate ideas to solve a peanut sheller design problem. The students generated ideas …
A Novel Extrusion-Based Additive Manufacturing Process For Ceramic Parts, Amir Ghazanfari, Wenbin Li, Ming Leu, Gregory Hilmas
A Novel Extrusion-Based Additive Manufacturing Process For Ceramic Parts, Amir Ghazanfari, Wenbin Li, Ming Leu, Gregory Hilmas
Faculty Publications, Mechanical Engineering
An extrusion-based additive manufacturing process, called the Ceramic On-Demand Extrusion (CODE) process, for producing three-dimensional ceramic components with near theoretical density is introduced in this paper. In this process, an aqueous paste of ceramic particles with a very low binder content (<1 vol%) is extruded through a moving nozzle at room temperature. After a layer is deposited, it is surrounded by oil (to a level just below the top surface of most recent layer) to preclude non-uniform evaporation from the sides. Infrared radiation is then used to partially, and uniformly, dry the just-deposited layer so that the yield stress of the paste increases and the part maintains its shape. The same procedure is repeated for every layer until part fabrication is completed. Several sample parts for various applications were produced using this process and their properties were obtained. The results indicate that the proposed method enables fabrication of large, dense ceramic parts with complex geometries.
Properties Of Partially Stabilized Zirconia Components Fabricated By The Ceramic On-Demand Extrusion Process, Wenbin Li, Amir Ghazanfari, Devin Mcmillen, Ming Leu, Gregory Hilmas, Jeremy Watts
Properties Of Partially Stabilized Zirconia Components Fabricated By The Ceramic On-Demand Extrusion Process, Wenbin Li, Amir Ghazanfari, Devin Mcmillen, Ming Leu, Gregory Hilmas, Jeremy Watts
Faculty Publications, Mechanical Engineering
The Ceramic On-Demand Extrusion (CODE) process is a novel additive manufacturing process for fabricating dense ceramic components from aqueous pastes of high solids loading. In this study, 3 mol% Y2O3 stabilized tetragonal zirconia polycrystal (3Y-TZP) parts were fabricated using the CODE process. The parts were then dried in a humidity controlled environmental chamber and sintered under atmospheric pressure. Mechanical properties of the sintered parts were examined using ASTM standard test techniques, including density, Young’s modulus, flexural strength, Weibull modulus, fracture toughness and Vickers hardness. The microstructure was analyzed, and grain size was measured using scanning electron microscopy. The results compared …