Elastic constants for wood by an ultrasonic method

@article{Bucur2004ElasticCF,
  title={Elastic constants for wood by an ultrasonic method},
  author={Voichita Bucur and Ronald Archer},
  journal={Wood Science and Technology},
  year={2004},
  volume={18},
  pages={255-265}
}
Ultrasonic measurements were carried out on cubic specimens of six species (pine, spruce, douglas-fir, oak, beech, tulip-tree). An orthotropic model of wave propagation was used to interpret these measurements and compute estimates of the elastic compliances. In order to calculate the off-diagonal stiffness terms, velocities were computed on samples with faces at an angle to the principal directions. The elastic compliance matrix was calculated by inverting the stiffness matrix. 
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