Experimental study of thermal degradation in ferritic Cr–Ni alloy steel plates using nonlinear Lamb waves

Xiang, Yanxun; Deng, Mingxi; Xuan, Fu‐Zhen; Liu, Changjun

doi:10.1016/j.ndteint.2011.08.005

Cited by 85 publications

(50 citation statements)

References 28 publications

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“…The amplitudes of these two modes are related by the so-called acoustic nonlinearity parameter, β, where A 1 and A 2 are the wave amplitudes at f E and 2 f E , respectively. Ω is the wavenumber, x the propagation distance, and γ a function depending on wave parameters and medium properties [23], which does not vary with respect to the condition of the medium (healthy or damaged). Based on Eq.…”

Section: Relative Acoustic Nonlinearity Parametermentioning

confidence: 99%

“…RANP is to be employed in this study for identification of BVID in composites. It has been revealed in a number of studies [23][24][25][26][27][28] that the presence of small-scale damage in materials, such as fatigue cracks, thermal degradation and corrosion, generally increases local nonlinearities inherent in the damaged area of the materials. When Lamb waves traverse this area, the nonlinear distortion reflected in the acquired signals becomes more pronounced as compared to that in the pristine (healthy) condition, and this results in an increased value of the RANP.…”

Section: Relative Acoustic Nonlinearity Parametermentioning

confidence: 99%

See 1 more Smart Citation

Uncertainty quantification for acoustic nonlinearity parameter in Lamb wave-based prediction of barely visible impact damage in composites

Hong

Mao

Todd

et al. 2017

Mechanical Systems and Signal Processing

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a b s t r a c tNonlinear features extracted from Lamb wave signals (e.g., second harmonic generation) are demonstrably sensitive to microscopic damage, such as fatigue and material thermal degradation. While a majority of the existing studies in this context is focused on detecting undersized damage in metallic materials, the present study is aimed at expanding such a detection philosophy to the domain of composites, by linking the relative acoustic nonlinearity parameter (RANP) -a prominent nonlinear signal feature of Lamb waves -to barely visible impact damage (BVID) in composites. Nevertheless, considering immense uncertainties inevitably embedded in acquired signals (due to instrumentation, environment, operation, computation/estimation, etc.) which can adversely obfuscate nonlinear features, it is necessary to quantify the uncertainty of the RANP (i.e., its statistics) in order to enhance decision-making associated with its use as a detection feature. A probabilistic model is established to numerically evaluate the statistical distribution of the RANP. Using piezoelectric wafers, Lamb waves are acquired and processed to produce histograms of RANP estimates in both the healthy and damaged conditions of a CF/EP laminate, to which the model is compared, with good agreement observed between the model-predicted and experimentally-obtained statistic distributions of the RANP. With the model, BVID in the laminate is predicted. The model is further made use of to quantify the level of confidence in damage prediction results based on the concept of a receiver operating characteristic, enabling the practitioners to better understand the obtained results in the presence of uncertainties.

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Section: Relative Acoustic Nonlinearity Parametermentioning

confidence: 99%

Section: Relative Acoustic Nonlinearity Parametermentioning

confidence: 99%

Uncertainty quantification for acoustic nonlinearity parameter in Lamb wave-based prediction of barely visible impact damage in composites

Hong

Mao

Todd

et al. 2017

Mechanical Systems and Signal Processing

View full text Add to dashboard Cite

show abstract

“…This pair has been widely investigated among researchers [16][17][18][19][20][21][22][23][24][25][26] for nonlinear guided waves, as both phase and group velocity of the primary mode match with the secondary mode and therefore easier for the signal post processing. The schematic of the plate model used for the simulation is shown in Fig.…”

Section: A Nonlinear Guided Waves In a Platementioning

confidence: 99%

“…waves, [16][17][18] evaluation of incipient damages (creep, 19 fatigue [20][21][22] and plasticity 23,24 ) in plate like structures, investigation of the material decay, 25,26 as well as assessment of thermal fatigue damages in isotropic pipes. 27 However, most studies on nonlinear ultrasonic guided waves are limited to simple geometries, such as plates, rods or pipes.…”

Section: Introductionmentioning

confidence: 99%

Numerical studies of nonlinear ultrasonic guided waves in uniform waveguides with arbitrary cross sections

Zuo

Zhou²,

Fan

2016

AIP Advances

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Nonlinear guided waves have been investigated widely in simple geometries, such as plates, pipe and shells, where analytical solutions have been developed. This paper extends the application of nonlinear guided waves to waveguides with arbitrary cross sections. The criteria for the existence of nonlinear guided waves were summarized based on the finite deformation theory and nonlinear material properties. Numerical models were developed for the analysis of nonlinear guided waves in complex geometries, including nonlinear Semi-Analytical Finite Element (SAFE) method to identify internal resonant modes in complex waveguides, and Finite Element (FE) models to simulate the nonlinear wave propagation at resonant frequencies. Two examples, an aluminum plate and a steel rectangular bar, were studied using the proposed numerical model, demonstrating the existence of nonlinear guided waves in such structures and the energy transfer from primary to secondary modes.

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“…Therefore, it is of increasing importance to establish an effective non-destructive characterization method of creep degradation at early stage for structural health monitoring (SHM). In recent years, it is noted that nonlinear ultrasonic technique, using the amplitude ratio of primary frequency to higher harmonic frequencies, has been found to be considerably sensitive to microstructure evolution of materials [5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Creep degradation characterization of titanium alloy using nonlinear ultrasonic technique

Xiang

Zhu

Liu

et al. 2015

NDT & E International

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Experimental study of thermal degradation in ferritic Cr–Ni alloy steel plates using nonlinear Lamb waves

Cited by 85 publications

References 28 publications

Uncertainty quantification for acoustic nonlinearity parameter in Lamb wave-based prediction of barely visible impact damage in composites

Uncertainty quantification for acoustic nonlinearity parameter in Lamb wave-based prediction of barely visible impact damage in composites

Numerical studies of nonlinear ultrasonic guided waves in uniform waveguides with arbitrary cross sections

Creep degradation characterization of titanium alloy using nonlinear ultrasonic technique

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