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Filtering by: Creator Su, Yi-Hsuan Remove constraint Creator: Su, Yi-Hsuan Academic Affiliation Mechanical, Industrial, and Manufacturing Engineering Remove constraint Academic Affiliation: Mechanical, Industrial, and Manufacturing Engineering Peer Reviewed No Remove constraint Peer Reviewed: No

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  • Influences of Replacing Cr with Mo in Fe25Co25Ni25Cr25-XMoX High Entropy Alloy Series on the Microstructure and Mechanical Properties

    Creator:
    Xu, Yifan
    Abstract:
    Fe25Co25Ni25Cr25-XMoX High Entropy Alloys were fabricated in mini arc-melter and then cast into 4mm diameter cylinders by injection casting technique and 1cm diameter cylinders by water quenching technique. Heat transfer modeling during solidification of FeCoNiCr HEA was simulated. Combining X-Ray Diffraction, Optical Microscopy, Scanning Electron Microscope, Energy Dispersive X-ray analysis,...
    Resource Type:
    Masters Thesis

  • A conceptual and strategy map for lean process transformation

    Creator:
    Mirdad, Waleed Khalid
    Abstract:
    Since the introduction of lean manufacturing by Toyota and publication by Womack and Jones, organizations have realized sizeable gains through lean process improvement. The spread of lean practices across organizations and industries – from manufacturing to healthcare and construction – requires adjustments of the lean process and, in the case...
    Resource Type:
    Masters Thesis

  • Assessing Mass Diffusion Modeling in Premixed Flames

    Creator:
    Fillo, Aaron J.
    Abstract:
    Implementing multicomponent diffusion in numerical combustion studies is computationally expensive due to the challenges involved in computing diffusion coefficients. As a result, mixture-averaged diffusion treatments or simpler methods are used to avoid these costs. However, the accuracy and appropriateness of the mixture-averaged diffusion model has not been verified for three-dimensional...
    Resource Type:
    Dissertation
    Full Text:
    cp ∇cp · ∇T , (2.3) ∂ρYi ∂t +∇ · (ρuYi) = −∇ · ji + ω̇i , (2.4) where ρ is the mixture density, u

  • Topological Design Considering Uncertainty and Hyperelasticity

    Creator:
    Pham, Trung
    Abstract:
    Topology optimization (TO) is a mathematical method to find the optimal size, shape and connectivity of a domain under specified conditions, and has had many applications in engineering design. However, challenges remain in realizing TO as an effective design tool for many design situations. Uncertainty is ubiquitous in nature and...
    Resource Type:
    Dissertation
    Full Text:
    its symmetry. 26 T ab le 2. 1: T h e M B B b ea m : R B T O re su lt s (a ,b ) (1 ,1

  • Evaluating Stiffness Metrics for Predicting the Cost of Chemical Kinetics Integration

    Creator:
    Alferman, Andrew Thomas
    Abstract:
    Simulations of combustion and reacting flows often encounter stiffness in the equations governing chemical kinetics. Explicit solvers for these ordinary differential equations offer low computational expense, but typically cannot efficiently handle stiff systems. In contrast, implicit methods demand greater expense but offer unconditional stability—as a result, most reactive-flow solvers rely...
    Resource Type:
    Masters Thesis
    Full Text:
    + ρα cp ∇cp· ∇T , (2.3) ∂ρYi ∂t +∇· (ρuYi) = −∇· ji + ω̇i , (2.4) where t is time, ρ is the fluid

  • Optical sensing and metrology for on-machine surface inspection in manufacturing processes

    Creator:
    Lee, Eddie T.
    Abstract:
    Optical sensing technologies are pivotal in the manufacturing process, specifically in defect detection, tool condition estimation, and monitoring. The research aims to enhance the accuracy, efficiency, and reliability of manufacturing metrology by employing optical sensing technologies, such as laser profilometers and image processing techniques. The dissertation proposes intelligent and flexible...
    Resource Type:
    Dissertation
    Full Text:
    ∫ l 0 z(x)4dx ] where Nx and Ny are the numbers of pixels along the x-axis and y-axis, g(xi, yi) is

  • Resilient Design for Complex Engineered Systems in the Early Design Phase

    Creator:
    Keshavarzi, Elham
    Abstract:
    There are many uncertainties that complex engineered systems will face throughout their lifecycles due to changes in internal and external conditions. It is desirable for complex engineered systems to be resilient against various uncertainties. The ability to overcome such uncertainties should be embedded into the system from the beginning. However,...
    Resource Type:
    Dissertation

  • Materials and process design for powder injection molding of silicon nitride for the fabrication of engine components

    Creator:
    Lenz, Juergen H. (Juergen Herbert)
    Abstract:
    A new material system was developed for fabricating the combustion engine of an unmanned aerial vehicle. The material system consisted of a mixture of nanoscale and microscale particles of silicon nitride. Magnesia and yttria were used as sintering additives. The powders were mixed with a paraffin binder system. The binder-powder...
    Resource Type:
    Masters Thesis

  • Fracture toughness of void-site-filled skutterudites

    Creator:
    Eilertsen, James S.
    Abstract:
    Thermoelectric materials are playing an increasingly significant role in the global effort to develop sustainable energy technologies. Consequently, the demand for materials with greater thermoelectric efficiency has stimulated the development of state-of-the-art interstitially doped skutterudite-based materials. However, since intermetallics are often embrittled by interstitial substitution, optimal skutterudite-based device design, manufacture,...
    Resource Type:
    Masters Thesis
    Full Text:
    ), 2029-2033. 13. Wen, P.; Li, P.; Zhang, Q.; Yi, F.; Liu, L.; Zhai, P., Effect of Cyclic Thermal

  • Optimizing ballast design of wave energy converters using evolutionary algorithms

    Creator:
    Colby, Mitchell
    Abstract:
    Wave Energy Converters (WECs) promise to be a viable alternative to current electrical generation methods. However, these WECs must become more efficient before wide-scale industrial use can become cost-effective. The efficiency of a WEC is primarily dependent upon its geometry and ballast configuration which are both difficult to evaluate, due...
    Resource Type:
    Masters Thesis
    Full Text:
    “ 1 to no do 15 y⃗i “ σpz⃗4,iq ; 16 end 17 return: y⃗ ; The key step in developing a neural network