Data Averaging of Anisotropic Composite Material Constants

Wu, EM; Jerina, KL; Lavengood, R. E.

doi:10.1520/stp36488s

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…This approach is sirnilar to that used in composite materials characterisation, where the need for data averaging (WU et al 1973) arises from handling experimental data of a tensorial nature.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Wood Structural Anisotropy Estimated by Acoustic Invariants

Bucur¹

1988

IAWA J

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Wood anisotropy is induced by the specific deposition of anatomical elements during the life of the tree. The anisotropy becomes evident when acoustical properties are measured in the different main symmetry directions.The first approach for the estimation of wood anisotropy was to calculate the ratios of longitudinal and shear velocities in natural symmetry directions. The modeling of wood structure is required in order to relate the anatomical structure to the acoustical behaviour of wood.The second approach for wood anisotropy interpretation was to compute acoustic invariants and to average them. Considering that those quantities are insensitive to the direction of propagation, they can act as references for anisotropy investigation. Combining the values of invariants in the three main symmetry planes yields a single global value that characterises each species.Values of invariants for 15 species (conifers and broadleaves) are given.

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Section: Theoretical Considerationsmentioning

confidence: 99%

Wood Structural Anisotropy Estimated by Acoustic Invariants

Bucur¹

1988

IAWA J

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“…Averaging of the compliance data can be performed by using the invariants [13,14] In the above equations S' stands for the average of S and % in Table 2.…”

Section: S(and)mentioning

confidence: 99%