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Filtering by: Subject Plywood -- Mechanical properties Remove constraint Subject: Plywood -- Mechanical properties Committee Member Lachenbruch, Barbara Remove constraint Committee Member: Lachenbruch, Barbara

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  • Improving wood strength and stiffness through viscoelastic thermal compression

    Creator:
    O'Connor, John P.
    Abstract:
    The objective of this research project was to increase the density, strength, and stiffness of two low to medium-density diffuse-porous hardwood species. Wood used in this study was processed using a method of wood densification known as “Viscoelastic Thermal Compression” (VTC). The VTC process is a three phase treatment which...
    Resource Type:
    Masters Thesis
    Full Text:
    ). The VTC process is a three phase treatment which incorporates saturated steam treatment, mechanical

  • Estimating spatial changes in acoustic velocity in felled Douglas-fir stems

    Creator:
    Dowding, Bodie
    Abstract:
    To compete with other building materials, the wood products industry must find a way to increase value and lower costs. Wood stiffness is important for most wood uses. Value can be increased and costs can be lowered by sorting logs for stiffness in the woods using acoustic devices mounted on...
    Resource Type:
    Masters Thesis
    Full Text:
    the most important mechanical properties for most wood uses (Xu et. al. 2004). The structural use

  • Chemical modification of wood : dimensional stabilization of viscoelastic thermal compressed wood

    Creator:
    Gabrielli, Christopher P.
    Abstract:
    The tendency of wood to shrink and swell with changing moisture content remains as one of the most significant challenges to using wood in its many applications. Viscoelastic Thermal Compression (VTC) has been shown to significantly increase the density, strength and stiffness of wood. However, dimensional stability is still a...
    Resource Type:
    Masters Thesis
    Full Text:
    dynamic heat, steam, and mechanical compression treatment to densify wood. This process takes advantage

  • Modeling changes in flexural properties of softwood beams during fungal decomposition

    Creator:
    Mitsuhashi Gonzalez, June M.
    Abstract:
    Moisture intrusion in residential structures can lead to substantial fungal decay and this damage costs billions in repair/replacement costs. The extent of damage and the rate at which it occurs are primarily dependent on the wood moisture content and temperature in the structure. Determining the risk of decay for various...
    Resource Type:
    Dissertation
    Full Text:
    evidence showing that fungi cause dramatic losses in the mechanical and flexural properties of wood at

  • Evaluation of a prototype NIR system for Douglas-fir wood density estimation

    Creator:
    Belart Lengerich, Maria Francisca
    Abstract:
    Forest products companies in the U.S. face vigorous competition from other wood producers around the world and other industries (steel, aluminum, plastics, composites). To be competitive, forest companies need to control costs, sort and allocate logs to the most appropriate markets, and recover more value at time of harvest. Interest...
    Resource Type:
    Masters Thesis
    Full Text:
    mechanical and chemical properties of solid wood, based on a “full” spectral range (500 nm – 2400 nm) and a

  • 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:
    modulus of elasticity (MOE), also known as stiffness, is an important mechanical property and is the