Index Catalog // ScholarsArchive@OSU

Genetic variation in basic density and modulus of elasticity of coastal Douglas-fir

Creator:: Johnson, G. R. and Gartner, Barbara L.
Abstract:: Douglas-fir trees from 39 open-pollinated families at four test locations were assessed to estimate heritability of modulus of elasticity (MOE) and basic density. After trees were felled, sound velocity was measured on 4-m logs with the Director HM200. Disks were taken to estimate dry and green wood density; dynamic MOE...
Resource Type:: Article
Full Text:: elasticity (MOE) and basic density. After trees were felled, sound velocity was measured on 4-m logs with

Moisture effects on properties of wood-composite assemblies

Creator:: King, David
Abstract:: Engineered wood composites are used in many structural applications and are intended for dry use. However, these materials may encounter significant amounts of wetting while in service, which can lead to structural failures. This study combined aspects of wood science, mechanics, structural engineering, and mycology to assess changes in material...
Resource Type:: Masters Thesis
Full Text:: Appendix K - Digital Image Correlation Strain Maps ....................................... 160

Non-destructive evaluation of veneer using optical scanning and ultrasonic stress wave analysis systems

Creator:: DeVallance, David B.
Abstract:: Non-destructive commercial ultrasonic grading provides laminated veneer lumber (LVL) manufacturers a means for sorting veneer based on average ultrasonic propagation time (UPT) and/or average dynamic modulus of elasticity (MOEd). While this may provide reliable estimations of modulus of elasticity (MOE), little is known about the influence of veneer defects on...
Resource Type:: Dissertation
Full Text:: modulus of elasticity (MOE), little is known about the influence of veneer defects on strength

Examination of lateral stiffness and strength of pitched residential roof diaphragms with implications for seismic design.

Creator:: Kirkham, William J.
Abstract:: There are about 80 million single-family dwellings (SFD) in the United States, predominantly of wood-frame construction. Of these, 68% are owner occupied. A home is typically the largest single investment of a family, and is often not covered by earthquake insurance, even where it is available. Of all SFD in...
Resource Type:: Dissertation

Development and evaluation of oriented strandboard bonded with soy-based formaldehyde-free adhesives

Creator:: Schwarzkopf, Matthew John
Abstract:: Synthetic adhesives like phenol formaldehyde (PF) and isocyanates dominate the wood based structural panel market. The raw materials that makeup these adhesives are based on petroleum and natural gas. The sustainability and the continued success of the wood based structural panel industry will benefit from the development of alternative adhesives...
Resource Type:: Masters Thesis
Full Text:: (MOR), and modulus of elasticity(MOE) of the resulting R-OSB panels. The highest IB, MOR and MOE

Bending property enhancement of wood strand composite using viscoelastic thermal compression

Creator:: Rathi, Vardan M.
Abstract:: The fundamental intent of the study was to develop an innovative wood-strand composite for use in structural applications. Plantation grown, low density, hybrid poplar was used in the study which was found to be appropriate for the underlying Viscoelastic Thermal Compression (VTC) process. Wood modified by this process has high...
Resource Type:: Masters Thesis
Full Text:: significant increase of MOE and MOR. The addition of 40% VTC strands improved the MOE and MOR by 30% and 18

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:: swelling, and thickness recovery. Modulus of elasticity (MOE) was also examined for each treatment

Evaluation of new formaldehyde-free, soy flour-based wood adhesives for making particleboard

Creator:: Gu, Kai
Abstract:: Formaldehyde-based adhesives such as urea-formaldehyde (UF), phenol-formaldehyde (PF) are widely applied in wood-based composite industry. However, these adhesives are all petrochemical-based and could not sustain in a long term due to a limited reserve of oil and natural gas. Moreover, these adhesives emit carcinogenic formaldehyde in the production or use...
Resource Type:: Masters Thesis
Full Text:: enhancing the modulus of rupture (MOR), modulus of elasticity (MOE) and internal bond (IB) of the

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:: processed Eastern cottonwood has shown increases in density, MOE, and MOR of up to 178, 254, and 156

Effect of Hole Edge Distance on Strength of Through-Bored Utility Poles

Creator:: Romanaggi, Bennett T.
Abstract:: There are over 130 million wood poles supporting electrical transmission and distribution lines in the U.S. The vast majority of these poles are preservative treated to prolong their useful life. In some cases, however, the depth of treatment is relatively shallow, leaving a deep zone of moderately durable, untreated heartwood....
Resource Type:: Masters Thesis
Full Text:: only a minimal effect on modulus of rupture (MOR) or modulus of elasticity (MOE) and the

ScholarsArchive@OSU

Genetic variation in basic density and modulus of elasticity of coastal Douglas-fir

Moisture effects on properties of wood-composite assemblies

Non-destructive evaluation of veneer using optical scanning and ultrasonic stress wave analysis systems

Examination of lateral stiffness and strength of pitched residential roof diaphragms with implications for seismic design.

Development and evaluation of oriented strandboard bonded with soy-based formaldehyde-free adhesives

Bending property enhancement of wood strand composite using viscoelastic thermal compression

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

Evaluation of new formaldehyde-free, soy flour-based wood adhesives for making particleboard

Improving wood strength and stiffness through viscoelastic thermal compression

Effect of Hole Edge Distance on Strength of Through-Bored Utility Poles

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