Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Street, Jason T.
Committee Member
Shmulsky, Rubin
Committee Member
Seale, R. Daniel
Date of Degree
12-14-2018
Document Type
Graduate Thesis - Open Access
Major
Sustainable Bioproducts
Degree Name
Master of Science (M.S.)
College
College of Forest Resources
Department
Department of Sustainable Bioproducts
Abstract
This research investigates the effect that knots in close proximity have on strength properties of southern pine lumber. The project involved specimens of 2×4 dimension southern yellow pine lumber exhibiting multiple knots in close proximity. Knot dimensions were measured to determine the knot diameter (KD) parallel to the cross-section of the specimen, knot area (KA), and clear wood (CW). In addition, the density (D) using the entire specimen weight by volume was determined. A third-point bending test was used in a flatwise orientation to quantify the modulus of rupture (MOR) and modulus of elasticity (MOE). The relationships between the simple correlation coefficients showed significant correlation. Multiple regression analysis with one dependent variable, MOR, and three independent variables, KD, MOE, and D resulted in a coefficient of determination value (r2) of 0.702 as contrasted with 0.564 obtained by using MOE alone to predict MOR.
URI
https://hdl.handle.net/11668/18538
Recommended Citation
Barbosa, Marcela Cordeiro, "Effect of Multiple Knots in Close Proximity on Southern Pine Lumber Properties" (2018). Theses and Dissertations. 1671.
https://scholarsjunction.msstate.edu/td/1671