Modulus of Elasticity of Wood Composite Panels with a Uniform Vertical Density Profile: A Model
Keywords:Model, modulus of elasticity, Monte Carlo simulation, orientation, oriented strandboard, particleboard, tension, wood composites
An analytical model was developed to understand and predict the development of modulus of elasticity (MOE) of wood composite panels with a uniform vertical density profile. The model analysis was based on the assumption of elasticity and all particles being bonded together. The simulation showed that MOE of particleboard decreased as average out-of-plane orientation angle of particles increased, but was not influenced by particle size. The simulation also showed that high density wood species resulted in higher MOE when used to manufacture composites at the same compaction ratios as low density wood species, but resulted in lower MOE at the same board density levels.
In single layer oriented strandboard (OSB), MOE in the orientation direction increased continuously as percent alignment increased; MOE across the orientation direction decreased and then leveled off after the percent alignment exceeded approximately 60%.
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