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  • Direct coupling of imaging to morphology-based numerical modeling as a tool for mechanics analysis of wood plastic composites

    Creator:
    Lin, Xiang
    Abstract:
    Polymeric composites reinforced with bio-materials have advantages over composites with synthetic reinforcements. Bio-based composites use low-cost and renewable reinforcements, have nonabrasive properties for machining, have improved damping characteristics, and have potential for energy recycling. However, the limited use of bio-based composites is because their mechanical properties are typically much lower...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: John A. Nairn Polymeric composites reinforced with bio-materials have

  • Utilization of ground peanut husk as an alternative fiber material for particleboard

    Creator:
    Newton, Jacob A.
    Abstract:
    This research examined the potential for using peanut husk as a fiber alternative to wood in the production of melamine-formaldehyde (MF) particleboard. MF resin was used to produce panels with one, three, six, nine or 12 percent resin contents. Modulus of Rupture (MOR), Modulus of Elasticity (MOE), Internal Bond (IB)...
    Resource Type:
    Honors College Thesis
    Full Text:
    _____________________________________________________________________ John A. Nairn. Committee Member, representing Wood Science and Engineering

  • Experimental characterization of saw chain cutting performance

    Creator:
    Otto, Andrew W.
    Abstract:
    Chainsaw users value cutting performance and safety. Knowledge of the forces exerted during sawing are necessary to understand and improve the cutting performance of saw chain. Additionally, cutting forces can be used to form metrics for evaluating performance tradeoffs when using a safety (i.e. low-kickback) saw chain versus a standard...
    Resource Type:
    Masters Thesis
    Full Text:
    : __________________________________________________________________ John P. Parmigiani Chainsaw users value cutting performance and safety. Knowledge of

  • Defining Project‐Specific Custom CLT Grade Utilizing Low‐Value Ponderosa Pine Lumber from Logs Harvested in SW Oregon and Northern California Forest Restoration Programs

    Creator:
    Jahedi, Sina
    Abstract:
    Restoration programs effectively prevent or mitigate wildfires and pest outbreaks in the forest lands. The most common approach is to selectively harvest smaller and dead trees in order to preserve larger and superior trees. Ponderosa pine, Pinus ponderosa, (PP) lumber is one of the common species harvested from restoration programs...
    Resource Type:
    Dissertation
    Full Text:
    to thank my committee members Dr. John Nairn, Dr. Gerald Presley, and Dr. Kyle Niemeyer who

  • Structural Design and Testing of Mass Timber Concrete Composite Floor Solutions with Acoustic Interlayers

    Creator:
    Srivastava, Mohit Raja
    Abstract:
    Timber-concrete composite (TCC) solutions originated in the early twentieth century. There has been a renewed interest in TCC solutions in modern mass timber buildings, especially for floor systems. However due to lack of data, design standards, and code acceptance, TCC solutions require that new mass timber solutions be tested, and...
    Resource Type:
    Masters Thesis
    Full Text:
    challenges and obstacles along the way. • To my committee members, Dr. Barbara G. Simpson, Dr. John Nairn

  • Numerical Modeling of Mass Timber Connections

    Creator:
    Hollenbeck, Sean R.
    Abstract:
    Cross-Laminated Timber (CLT) is a prefabricated building material that is relatively new to the United States and North America. It consists of no less than three layers of graded, dimensional lumber glued in alternating longitudinal and transverse layers to create a panel that can be used for various building applications...
    Resource Type:
    Masters Thesis
    Full Text:
    , Dr. Ari Sinha, Dr. Tom Miller and Dr. John Nairn, for providing valuable guidance and insight. Dr

  • A performance comparison of chainsaw bar lubricants

    Creator:
    Suryan, Levi J.
    Abstract:
    Chainsaws, an indispensable tool for modern forestry operations, rely on bar lubricant to prevent rapid wear of the chain and bar. Choice of bar lubricant must balance performance, cost, and biological impact. Many bar lubricants are available, but little published work exists that conclusively ranks the performance of these choices....
    Resource Type:
    Masters Thesis
    Full Text:
    committee members Dr. John Nairn and Dr. Rajiv Malhotra for providing high quality instruction, as well as

  • Crack Penetration and Deflection Behavior at Interfaces

    Creator:
    Alam, Mahabub
    Abstract:
    This study computationally and experimentally examines the mechanisms of crack penetration, deflection and the transition between penetration and deflection. The finite element analysis based computational modeling work used strength-and-energy based cohesive-zone approach to study the effect of dimensionless parameters (e.g., interfacial incident angle, fracture-length scale, and normalized toughness) on penetration/deflection...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ John P. Parmigiani This study computationally and experimentally examines the mechanisms

  • Investigation of Styrene-Free Unsaturated Polyester Resins for Fiber-Reinforced Composites

    Creator:
    Wu, Yili
    Abstract:
    Most of existing commercial unsaturated polyester (UPE) resins are typically composed of a UPE and a high amount of highly volatile, flammable, and toxic styrene. The emission of hazardous styrene in the handling of the UPE resins and the preparation and use of fiber-reinforced UPE composites poses severe hazards to...
    Resource Type:
    Dissertation
    Full Text:
    . John Nairn, Dr. Chih- hung Chang, and Dr. Matthew Powers, for their time in attending my preliminary

  • Pressure sensitive adhesives based on oleic acid

    Creator:
    Wu, Yili
    Abstract:
    Existing pressure sensitive adhesives (PSAs) are mostly based on petrochemicals. In this study, a novel PSA based on a renewable material, methyl oleate, was prepared and characterized. Methyl oleate was first epoxidized to form epoxidized methyl oleate that was subsequently hydrolyzed and acidified to form epoxidized oleic acid (EOA) which...
    Resource Type:
    Masters Thesis
    Full Text:
    . John Nairn, Dr. Chih-hung Chang, and Dr. Glenn Howe, for their time in reviewing my thesis and