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  • Photomechanics of stress transfer mechanisms in composite materials

    O Criador:
    Edelman, Walter E.
    Abstract:
    A study of stress transfer near the ends of the whisker in a simulated whisker reinforced composite material was conducted by using photoelastic techniques. The composite material studied was αAl₂O₃ whiskers in an aluminum matrix. The photoelastic models used consisted of a scaled-up macroscopic stiffener embedded in a three-dimensional epoxy...
    Resource Type:
    Dissertation
    Full Text:
    , JR. 1967 Photomechanics of Stress Transfer Mechanisms in Composite Materials by Walter Eugene

  • Polyurethane impregnated Kevlar 29 fabric for coal transport railcars

    O Criador:
    Sarangabany, Perumal
    Abstract:
    Stress analysis was performed to determine the maximum stress acting on a railcar coal support-bed, using COSMOS finite element and WFM micromechanics models. The fracture strength of polyurethane impregnated Kevlar 29 fabric, proposed for integration with the railcar structure, was determined experimentally by loading the impregnated coupons in a microcomputer...
    Resource Type:
    Masters Thesis
    Full Text:
    in Materials Science presented on March 28, 1994. Title: Polyurethane Impregnated Kevlar 29

  • The effects of extractives and compatibilizers on the flexural properties of natural fiber-thermoplastic composites

    O Criador:
    Saputra, Hartono A.
    Abstract:
    Natural fibers such as wood, flax, and hemp are frequently used as fillers in natural fiber-plastic composites (NFPCs). At present, wood fiber is the most commonly used filler in the production of wood-plastic composites (WPCs). The advantages of these fibers compared to conventional inorganic fibers such as glass fiber is...
    Resource Type:
    Masters Thesis
    Full Text:
    of Master of Science in Wood Science and Materials Science presented on June 15, 2004. Title: The

  • Characterization of load transfer in wood-based composites

    O Criador:
    Schwarzkopf, Matthew John
    Abstract:
    The mechanical performance of composite materials is determined by the mechanical properties of their individual components and the effective load transfer between these components. Binders are commonly used to bond composite components together and to provide effective load transfer between them. In wood-based composites the binder-component load transfer occurs at...
    Resource Type:
    Dissertation
    Full Text:
    comprise a substantial volume fraction of the composite serving as a matrix material as in wood plastic

  • Investigation into the role of strength and toughness in composite materials with an angled incident crack

    O Criador:
    Grimm, Brian A.
    Abstract:
    Understanding the mechanical behavior of composite materials requires extensive knowledge of fracture behavior as a crack approaches an interface between the bulk material and the reinforcement structure. Overall material toughness can be greatly influenced by the propensity of an impinging crack to propagate directly through the substrate or deflect along...
    Resource Type:
    Masters Thesis
    Full Text:
    Toughness in Composite Materials with an Angled Incident Crack Abstract approved John P

  • New application of crystalline cellulose in rubber composites

    O Criador:
    Bai, Wen
    Abstract:
    Rubber without reinforcement has limited applications. The strength of reinforced rubber composites can be ten times stronger than that of unreinforced rubbers. Therefore, rubber composites are widely used in various applications ranging from automobile tires to seals, valves, and gaskets because of their excellent mechanical elastic properties. Silica and carbon...
    Resource Type:
    Dissertation
    Full Text:
    of the proposed mechanisms, free radical mechanism, is illustrated in Figure 1. 8 (Coran, 1978b

  • Gas injection consolidation of miniature natural fiber beams

    O Criador:
    Kim, Jae-Woo
    Abstract:
    The internal structure of natural fiber composites can be manipulated by controlling the spatial distribution of fiber orientation and internal chemical and thermodynamic conditions during their consolidation. Objects highly tailored to specific service demands may thereby be produced. Techniques to form miniature structural beams from oriented hemp and random wood...
    Resource Type:
    Dissertation
    Full Text:
    BE USED iN COMPOSITE MATERIALS 192 APPENDIX B ENGINEERING DRAWING 208 APPENDIX C 7-SELECTED CYCLES

  • Synthesis and characterization of magnetic composite materials

    O Criador:
    Kimmell, Robert
    Abstract:
    Iron epoxy composite materials were made and their relative magnetic permeability was measured. A measurement device was created to measure the relative magnetic permeability for the specific application. This device proved to be accurate and reliable. The magnetic properties of composite materials have been shown to be controllable, with a...
    Resource Type:
    Masters Thesis
    Full Text:
    , with a linear response to volume fraction of iron in the composite. A material with a maximum relative

  • Soft Magnetic Composites for High Frequency Applications

    O Criador:
    Song, Han
    Abstract:
    Soft magnetic composites, consisting of fine metallic particles in a non-magnetic, insulating matrix, have great potential for integrated inductor and antenna applications. The dielectric and magnetic properties of soft magnetic composites can be tailored by the choice of matrix as well as particle composition, size, and concentration for reduction in...
    Resource Type:
    Dissertation
    Full Text:
    DISSERTATION OF Han Song for the degree of Doctor of Philosophy in Materials Science presented on September

  • Development and evaluation of novel coupling agents for kenaf-fiber-reinforced unsaturated polyester composites

    O Criador:
    Ren, Xiaofeng
    Abstract:
    Natural fibers are gaining popularity as reinforcement materials for thermoset resins over the last two decades. Natural fibers are inexpensive, abundant, renewable and environmentally friendly. Kenaf fibers are one of the natural fibers that can potentially be used for reinforcing unsaturated polyester (UPE). As a polymer matrix, UPE enjoys a...
    Resource Type:
    Dissertation
    Full Text:
    Xiaofeng Ren for the degree of Doctor of Philosophy in Wood Science and Materials Science presented on