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  • A study of solidification dynamics with liquid mass influx

    Creator:
    Thirunavukarasu, Balamurugesh
    Abstract:
    A computational model is developed to study the effects of alumina layer formation on an ablative surface when exposed to high temperature particle laden gas flow. The solidification dynamics i.e., the solid and liquid alumina layer growth rate, and the heat transferred to the ablative surface are investigated. A one-dimensional...
    Resource Type:
    Masters Thesis
    Full Text:
    of ablative materials. The model assumes that the particles impact the ablative material and reflect

  • Creep of Gr/BMI composite laminates in compression

    Creator:
    Tyagi, Sanjeev R.
    Abstract:
    The main source of the time-dependent behavior of fiber-reinforced composites is their polymeric matrix, which causes concerns about their long term durability. Although for composites where organic fibers such as Graphite are used, the fibers are also a contributing factor. A composite material may exhibit an appreciable amount of creep,...
    Resource Type:
    Masters Thesis
    Full Text:
    material parameters 73 6.3.2 Creep Predictions using mathametical model 73 6.4 Figures for the predicted

  • Exchange interaction studies in magnetic semiconductors by neutron scattering

    Creator:
    Wiren, Zachary Quincy
    Abstract:
    Theories predict that making a dilute magnetic semiconductor strongly p -type would allow it to remain ferromagnetic at room temperature. This is of intrest as a ferromagnetic semiconductor would allow for a great many applications in the field of spintronics. Neutron scattering experiments were undertaken to better understand the antiferromagnetic...
    Resource Type:
    Dissertation
    Full Text:
    the material large enough to be easily detected. Other commercial applications of spintronic devices

  • Automated feature extraction for orientation and slicing in microlamination

    Creator:
    Ariastuti, Retna
    Abstract:
    The research is about developing a computerized design system for microtechnology-based energy, and chemical systems (MECS). MECS devices are a part of microfabrication, which primarily focuses on taking advantage of the extremely high rates of heat and mass transfer available in microstructures. It typically consists of intricate arrays of components...
    Resource Type:
    Dissertation
    Full Text:
    of metal, ceramic, or polymeric material. In terms of size, MECS devices are in-between micro-scale

  • Design of composite sandwich panels for a Formula SAE monocoque chassis

    Creator:
    Story, Robert D.
    Abstract:
    Physical testing of composite sandwich panels in three point bending is an increasingly important aspect of qualifying a composite monocoque for Formula SAE competition. Required stiffness and strength values have increased over the past three years, and more of the monocoque's laminates must be tested as well. As a result,...
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1. Material Properties

  • Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

    Creator:
    Costa, Timothy B.
    Abstract:
    In this work we consider two multiscale applications with tremendous computational complexity at the lower scale. First, we examine a model for charge transport in semicon- ductor structures with heterojunction interfaces. Due to the complex physical phenomena at the interface, the model at the design scale is unable to adequately...
    Resource Type:
    Dissertation
    Full Text:
    of a mathematical model describing physical phenomena has been to trade resolution for scale. This

  • Thermodynamic correction for salts in variably saturated porous media

    Creator:
    Burns, Erick R.
    Abstract:
    Using thermodynamic principles, the general relationship describing the equilibrium vapor content in the gas phase above a saline liquid and across a curved liquid-gas interface is developed. Since high salt concentration also affects the intensive and extensive liquid properties, it is also necessary to account for these effects in liquid...
    Resource Type:
    Masters Thesis
    Full Text:
    years, and his conceptual model of flow of salts in unsaturated porous media formed the foundation upon

  • Thermodynamics of non-dilute saline solutions in variably saturated porous media

    Creator:
    Burns, Erick R.
    Abstract:
    Non-dilute salt strength solutions occur in many near surface geologic environments. In order to better understand the occurrence and movement of the water and salt, mathematical models for this non-ideal fluid need to be developed. Initial boundary value problems may then be solved to predict behavior for comparison with observations....
    Resource Type:
    Dissertation
    Full Text:
    better understand the occurrence and movement of the water and salt, mathematical models for this non

  • The significance and measurement of the Tsai-Wu normal interaction parameter F₁₂

    Creator:
    Hansen, William Christian
    Resource Type:
    Masters Thesis
    Full Text:
    of Material Characteristics 46 5.2.1.2 Biaxial Stress State Control 54 5.2.1.3 Failure Mode 57

  • Developing Design Model for Cellulose Nanocomposites

    Creator:
    Shir Mohammadi, Meisam
    Abstract:
    Today nano scale materials are being used for wide range of applications. One promising topic in nano scale materials is using them for reinforcement of different polymeric materials to reach desirable stiffness properties. The stiffness of these materials is mostly found experimentally because the nanocomposite community lacks a decent analytical...
    Resource Type:
    Dissertation
    Full Text:
    more preferably if they are avail- able. Basically analytical model is a mathematical equation that