Systems and methods for predicting the bending stiffness of...

Details Systems and methods for predicting the bending stiffness of... Systems and methods for predicting the bending stiffness of...

2006-06-27

2006-06-27

Williams, Hezron (Department: 2856)

Measuring and testing

Testing by impact or shock

Specimen impactor detail

C073S597000, C073S602000

Reexamination Certificate

active

07066007

ABSTRACT:
Generally described, a bending stiffness predicting system20includes a density measurement sub-system24and a sound wave velocity measurement sub-system28. From the measurements of both density and speed of sound through the wood product received from the sub-systems24and28, respectively, the bending stiffness (Y) may be predicted by calculating the bending stiffness (Y) according to the bending stiffness (MOE) equation: Y=kρV2/g; wherein k is the calibration constant, ρ is the density or specific gravity of the member, V is the velocity of a sound through the member and g is the acceleration due to gravity. The calculation of wood product bending stiffness may be carried out manually, or may be calculated using a calculating sub-system32from the two measured values, density and velocity, according to Equation 1 above.

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