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  • A study of compression loading of composite laminates

    Creator:
    Berbinau, Pierre J.
    Abstract:
    The compressive behavior of continuous fiber composites is not as well understood as their tensile behavior because research and industrial applications have until recently focused on the latter. Furthermore, most theoretical and experimental studies on the compression of composites have examined the case of unidirectional specimens with fibers along the...
    Resource Type:
    Dissertation
    Full Text:
    experimental results obtained from compression testing of graphite/thermoplastic laminates with the same ply

  • Development of performance based test procedures for asphalt mixtures

    Creator:
    Kliewer, Julie E.
    Abstract:
    In 1987, Congress authorized a 5 year $150 million dollar research program called the Strategic Highway Research Program (SHRP). SHRP was divided into four major areas, including the asphalt research program. The asphalt research program was divided into six major research contracts, one such contract, SHRP-003A was called Performance Related...
    Resource Type:
    Dissertation
    Full Text:
    , SHRP-003A was called Performance Related Testing and Measuring of Asphalt Aggregate Interaction and

  • Permanent deformation characteristics of dense-graded mixes using asphalt pavement analyzer

    Creator:
    Sandoval-Gil, Jesus A.
    Abstract:
    The Asphalt Pavement Analyzer (APA) device was used to characterize the impact of various mix factors on the development of permanent deformation in dense-graded mixes given a standard compactive effort. Factors included two aggregate sizes, three VMA levels, two fines contents, three binder contents and four binder types. All specimens...
    Resource Type:
    Dissertation

  • Development of the simplified method to evaluate dynamic mechanical analysis data on asphalt-aggregate mixtures

    Creator:
    Ab-Wahab, Yunus Bin
    Abstract:
    Testing of asphalt binders and asphalt-aggregate mixtures using dynamic mechanical analysis is becoming popular with improvements in high-speed computers, precision equipment, and computer software. Researchers are trying to describe the behavior of asphalt binders and asphalt-aggregate mixtures in terms of their time- and temperature-dependent linear viscoelastic behavior. The objectives of...
    Resource Type:
    Dissertation
    Full Text:
    Abstract approved: Dr. Chris A. Bell Testing of asphalt binders and asphalt-aggregate mixtures using

  • Development and characterization of novel hydrogels for nucleus pulposus replacement

    Creator:
    Bader, Rebecca A.
    Abstract:
    Hydrogels have been proposed as candidates for nucleus pulposus replacement due to their similarity in mechanical behavior to the native tissue when subjected to transient or static loading; however, given the viscoelastic nature of soft biological tissues, the lack of dynamic testing is a significant inadequacy in the studies performed...
    Resource Type:
    Dissertation
    Full Text:
    THE DISSERTATION OF Rebecca Ann Bader for the degree of Doctor of Philosophy in Material Science

  • Failure analysis of pre-notched composite laminated plates under four-point bending conditions

    Creator:
    Arias Gonzales, Sergio
    Abstract:
    Ever since composite laminate technology was introduced into the aerospace and automotive industry, there has been a need to fully understand the damage progression experienced by composite laminated plates in the presence of a notch. While numerous research studies have been conducted on this matter when subjected to in-plane loads,...
    Resource Type:
    Dissertation
    Full Text:
    ........................................................................................ 6 1.3.1 Testing of Notched Laminates under Four-point Bending...................... 8 1.3.2

  • In-forest log segregation based on acoustic measurement of wood stiffness

    Creator:
    Amishev, Dzhamal Y.
    Abstract:
    To remain competitive, the forest products industry needs to look for new and innovative processes and technologies to not only reduce costs but also to recover more value through the entire seedling-to-customer forest products supply chain. It is well recognized that measuring wood properties of logs in real time during...
    Resource Type:
    Dissertation
    Full Text:
    Page 1.1 Types of stress waves in semi-infinite elastic material…………………………6 1.2 The four

  • A nonlocal damage theory for laminated plate with application to aircraft damage tolerance

    Creator:
    Nahan, Matthew F.
    Abstract:
    Design of commercial aircraft structure, composed of composite material, requires the prediction of failure loads given large scale damage. In particular, a fuselage of graphite/epoxy lamination was analyzed for damage tolerance given a standard large crack that severed both skin and internal structure. Upon loading, a zone of damage is...
    Resource Type:
    Dissertation
    Full Text:
    softening by allowing for a reduction in stiffness. Testing of material taken from within the damage zone