Relationship between stress wave velocities of green and dry veneer

This paper evaluates the relationship between the stress wave velocities of green and dry southern pine and Douglas-fir veneers. A commercial stress wave timer and a laboratory signal analysis system were used to measure the transit time required for an induced stress wave to travel the longitudinal length of each veneer. Stress wave transit times were measured in the veneers in the wet condition and at a dry equilibrated moisture content of approximately 10 percent. A strong linear relationship was found between green and dry stress wave velocity for both southern pine and Douglas-fir veneers. The strength of the relationship was improved significantly when the signal analysis system was used.

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