P1H-9 Nonlinear Ultrasonic Lamb Wave Response to Fatigue of Solid Plates

Deng, Mingxi; Pei, Jian

doi:10.1109/ultsym.2006.343

Cited by 5 publications

(7 citation statements)

References 11 publications

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“…It was found that the nonlinear coefficient increased with increases in tensile load and fatigue cycle. Deng and Pei [9] tested the fatigue damage of aluminum plates using a nonlinear Lamb wave method and discovered that the stress wave factor decreased monotonously with increasing fatigue cycles. Walker et al [10] used a nonlinear Rayleigh wave to characterize the damage to an A36 steel specimen caused by a low-cycle tensile fatigue test.…”

Section: Introductionmentioning

confidence: 99%

Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing

Chen

Wang

et al. 2020

Shock and Vibration

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In view of the early fatigue damage of high-strength steel FV520B, a nonlinear ultrasonic detection was performed on two types of fatigue samples using nonlinear Lamb waves. The experimental results indicated that the ultrasonic nonlinear parameter is highly sensitive to early fatigue damage in high-strength FV520B. For plate specimens, the ultrasonic nonlinear parameter increased with the number of fatigue cycles. Scanning electron microscopy (SEM) observations of the fatigue specimens revealed that as the number of fatigue cycles increased, the microstructure of the material gradually deteriorated, and the ultrasonic nonlinear parameter increased. For notched specimens, the ultrasonic nonlinear parameter increased as the size of the main crack increased. SEM observations of the fracture indicated that the ultrasonic nonlinear parameters were more consistent with the equivalent microcrack length (defined as the sum of microcrack lengths in the statistical area), as compared with the length of the main crack. It was determined that the nonlinear effect of the Lamb wave is related to the equivalent microcrack length inside the material and that the ultrasonic nonlinear parameter can effectively characterize the fatigue damage state of high-strength FV520B.

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Section: Introductionmentioning

confidence: 99%

Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing

Chen

Wang

et al. 2020

Shock and Vibration

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“…In the region of 𝑦 ≤ 0, 𝑈 (DL) T is the driven longitudinal second harmonic with a cumulative effect, accompanying the fundamental wave 𝑢 T , and 𝑇 [2f] 𝑈 (DL) I is the transmitted second harmonic of 𝑈 (DL) I through the solid plate. All the driven longitudinal second harmonics with a cumulative effect are found to be [ignoring the factor exp(−𝑗4𝜋𝑓 𝑡)], [13] 𝑈 (DL)…”

mentioning

confidence: 99%

“…To satisfy the second-harmonic boundary conditions of continuous displacement and stress at the two surfaces 𝑦 = 0 and 𝑦 = 𝑑, the freely-propagating (denoted by the superscript FP) second harmonic without the cumulative effect in each region must be introduced. The formal solutions to the freely-propagating second harmonics introduced are given by [13] 𝑈 (FP)…”

mentioning

confidence: 99%

“…( 4), can readily be calculated. [13] On this basis, the total reflected second harmonic received by the TR at 𝑦 = ℎ + 𝑑 can now be completely determined by…”

mentioning

confidence: 99%

“…Only 𝑈 (FP) R is associated with the nonlinearity of plate material (𝛽 S ) through the satisfaction of second-harmonic boundary conditions of continuous displacement and stress. [13] For accurate assessment of the plate material where there is no or less change in its mass density and sound velocity but a clear change in its nonlinear acoustic parameter 𝛽 S , [5][6][7]10] it is required that both…”

mentioning

confidence: 99%

See 2 more Smart Citations

Second-Harmonic Generation of a Plane Wave Normally Incident upon a Solid Plate Immersed in Liquid

Deng¹,

Xiang²,

Wang³

et al. 2013

Chinese Phys. Lett.

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We theoretically investigate the second-harmonic generation of a plane longitudinal wave normally incident upon a solid plate immersed in liquid. The formulation of the reflected second harmonic is derived within the secondorder perturbation. Theoretical analysis and numerical simulation indicate that the reflected second-harmonic amplitude increases sensitively with the increase in the nonlinear acoustic parameter of the plate material at some specific frequencies where the linear reflection coefficient of the normally incident longitudinal wave takes on the minimum value, and that it is independent of the spatial separation between the transmitter/receiver and the solid plate. The results obtained provide a means through which the early state of fatigue-induced damage of the solid plate (characterized by its nonlinear acoustic parameter) can be sensitively assessed by measuring the reflected second harmonic at the specific frequency where the linear reflection coefficient is minimum.

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Evaluation of Material Degradation of Composite Laminates Using Nonlinear Lamb Wave

Cho

et al. 2011

RILEM Bookseries

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P1H-9 Nonlinear Ultrasonic Lamb Wave Response to Fatigue of Solid Plates

Cited by 5 publications

References 11 publications

Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing

Research on Fatigue Damage in High-Strength Steel (FV520B) Using Nonlinear Ultrasonic Testing

Second-Harmonic Generation of a Plane Wave Normally Incident upon a Solid Plate Immersed in Liquid

Evaluation of Material Degradation of Composite Laminates Using Nonlinear Lamb Wave

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