Abstract
ABSTRACT Asample of 25 loblolly pine trees {Pinus taeda L.) was measured to determine characteristics useful in the design and analysis of forestry equipment. Diameter-length relationships, mass, center of gravity, mass moment of inertia and bending deflection were investigated. The regression of dimensionless diameter on dimensionless length produced a relationship to predict diameter at any point along the bole. By integrating appropriate functions containing the diameter relation, expressions to predict tree-length center of gravity, mass and mass moment of inertia were developed. Predicted values (for study trees) showed good agreement with experimentally measured values. Modulus of elasticity along the axis parallel to the grain was derived for each tree bole from bending test data and an iterative finite element analysis program. Test results showed reasonable agreement with published values for small clear-wood specimens.
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