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Abstract
The effect of moisture on longitudinal stress-wave velocity (SWV), bending stiffness. and bending strength of commercial oriented strandboard, plywood. particleboard. and southern pine lumber was evaluated. It was shown that the stress-wave verocity decreased in general with increases in panel moisture content (MC). At a given MC level. SWV varied with panel type and test directions. Regression equations relating SWV to MC and bending properties (modulus of elasticity [MOE] and modulus of rupture [MOR] were established for various products. Both MOE and MOR at different MCs can be estimated by observing the speed of propagation of a longitudinal wave. This information is useful for developing moisture correction factors on the stress-wave related properties for wood-based panel products.
Keywords
Lumber,
moisture,
modulus of elasticity,
elasticity,
wave mechanics,
stress waves,
bending,
particle board,
nondestructive testing,
plywood,
southern pine,
oriented strandboard,
OSB,
stiffness,
bending strength,
moisture content
Citation
Han, Guangping; Wu, Qinglin; Wang, Xiping. 2006. Stress-wave velocity of wood-based panels: effect of moisture, product type, and material direction. Forest products journal. Vol. 56, no. 1 (Jan. 2006): Pages 28-33
