Plate Wave Propagation in Transversely Isotropic Materials

Kline, Ronald A.; Doroudian, Macan; Hsiao, Chiuder

doi:10.1177/002199838902300505

Cited by 8 publications

(2 citation statements)

References 13 publications

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“…Plate theory described the characters of elastic wave such as mode, velocity, and dispersion in thin plate (1) . Extensive studies have been conducted on the propagation of plate wave in laminates (2)(3)(4) . Applying classical plate theory and Mindlin approximate plate theory (5) , Prosser and Gorman (6) predicted the dispersion of the flexural mode waves in graphite/epoxy composite laminates.…”

Section: Introductionmentioning

confidence: 99%

An investigation into the propagation characteristics of AE signals in PE/PE composite laminates

Zhang¹,

Wang²,

Yang³

et al. 2007

Insight - Non-Destructive Testing and Condition Monitoring

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Section: Introductionmentioning

confidence: 99%

An investigation into the propagation characteristics of AE signals in PE/PE composite laminates

Zhang¹,

Wang²,

Yang³

et al. 2007

Insight - Non-Destructive Testing and Condition Monitoring

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“…Since the FRP is produced as a plate structure, the guide waves in the FRP plate have been studied during last 20years. Lamb wave, a typical elastic wave in a plate, is very dispersive and has many modes decided by the thickness and frequency whether the plate is an isotropic or an anisotropic [7][8][9][10][11][12][13][14]. However, the S 0 symmetric mode is less dispersive under the first cut-off frequency [8,11,15], but the directions of the phase velocity, the wave vector directions, are not accorded with the directions of group velocity, the direction of energy flow, in the anisotropy materials.…”

Section: Introductionmentioning

confidence: 99%

Group Velocity of Lamb Wave S<sub>0</sub> Mode in Laminated Unidirectional CFRP Plates

Jeong-Ki

Kim

Kim³

2005

KEM

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The elastic waves in the isotropic plate are dispersive waves with the characteristics of Lamb wave, however, S0 symmetric mode is less dispersive in the frequency region less than the first cut-off frequency. In the anisotropic plates such as CFRP plates, the propagation velocities vary with the directions as well as the dispersion of the Lamb wave, and the phase velocity direction does not accord with the group velocity direction. The phase velocity direction is equivalent the wave vector direction, while the group velocity direction is equivalent the energy flow direction. In this work, the group velocity dispersion curves were obtained by the dispersion relation of the Lamb wave in unidirectional CFRP plate with an orthotropic structure. The group velocities of the S0 symmetric mode in the frequency region less than the first cut-off frequency were corrected by applying the slowness surface. The propagation velocities of Lamb wave were decided by measuring the arrival time of the Lamb wave signals received with the two pinducers varying the propagating direction in the laminated unidirectional CFRP plates of 8, 16 and 24 plies having a volume fraction of 67%. The measured velocities are better agreement with corrected group velocity curve, except near the fiber direction at the cusp region. When the propagating direction is not accorded with the principal axis, the direction of the group velocities inclines toward the fiber direction in the unidirectional CFRP plates, suggesting that the energy propagates preferentially toward fiber direction.

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Guided Waves in Anisotropic Media: Applications

Kline

NATO Science Series II: Mathematics, Physics and Chemistry

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Plate Wave Propagation in Transversely Isotropic Materials

Cited by 8 publications

References 13 publications

An investigation into the propagation characteristics of AE signals in PE/PE composite laminates

An investigation into the propagation characteristics of AE signals in PE/PE composite laminates

Group Velocity of Lamb Wave S<sub>0</sub> Mode in Laminated Unidirectional CFRP Plates

Guided Waves in Anisotropic Media: Applications

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