Fundamentals of Nonlinear Acoustical Techniques and Sideband Peak Count

Kundu, Tribikram; Eiras, Jesús N.; Li, Weibin; Li, Peipei; Sohn, Hoon; Payá, J.

doi:10.1007/978-3-319-94476-0_1

Cited by 38 publications

(34 citation statements)

References 114 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SPC technique simply counts the number of peaks of different strengths that are generated in addition to the excitation frequency peaks because elastic waves of multiple frequencies interact with one another in a nonlinear material. [24][25][26] Thus, the SPC technique is relatively easy to use for both guided wave and multi-frequency bulk wave propagation cases. In this article, the SPC technique is combined with the LU technique to develop a hybrid LU-NLU inspection technique for holistic monitoring of composite plates subjected to impact-induced damage-from crack nucleation to macro-crack formation and propagation.…”

Section: Theoretical Foundation Of Spcmentioning

confidence: 99%

“…In this article, the SPC technique is combined with the LU technique to develop a hybrid LU-NLU inspection technique for holistic monitoring of composite plates subjected to impact-induced damage-from crack nucleation to macro-crack formation and propagation. In their earlier works, Kundu and colleagues [24][25][26] successfully applied the SPC technique for monitoring aging of glass fiber-reinforced cement and detecting fatigue cracks in metal plates. In this article, the SPC technique is extended to monitor impact-induced damage in composite plates.…”

Section: Theoretical Foundation Of Spcmentioning

confidence: 99%

See 1 more Smart Citation

Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques

Alnuaimi

Amjad

Russo

et al. 2020

Structural Health Monitoring

Self Cite

View full text Add to dashboard Cite

In this article, a holistic technique for sensing damage initiation, as well as damage progression in composite plates, is presented combining linear and nonlinear ultrasonic techniques. For this investigation, multiple sets of composite plate specimens made of two different composite materials were fabricated to check if the proposed technique works for different types of specimens. The specimens were damaged by impact loading and then inspected by propagating Lamb waves through them. Different failure mechanisms, such as fiber breaks, matrix cracking, debonding, and delamination, cause composite damage. Two groups of composite specimens that were fabricated and damaged were glass fiber–reinforced polymer composite and basalt fiber–reinforced polymer composite. A chirp signal excited by PZT (lead zirconate titanate) transducer was propagated through undamaged and damaged specimens to investigate the effects of varying degrees of damage on the recorded signals. Both linear and nonlinear ultrasonic parameters were extracted from the recorded signals and analyzed. The change in the linear ultrasonic parameters such as the wave speed and attenuation with damage progression were recorded. A new nonlinear ultrasonic parameter, the sideband peak count or sideband peak count-index, is also introduced and calculated from the recorded signals. It is observed that the nonlinear ultrasonic parameter can monitor the early stage of damage progression better than the linear ultrasonic parameters, while some linear ultrasonic parameters are more effective than the nonlinear ultrasonic parameter for monitoring the advanced stage of damage. Therefore, a combination of linear ultrasonic and nonlinear ultrasonic analyses is ideal for the holistic monitoring of the composite panels from the crack nucleation stage to the structural failure stage.

show abstract

Section: Theoretical Foundation Of Spcmentioning

confidence: 99%

Section: Theoretical Foundation Of Spcmentioning

confidence: 99%

Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques

Alnuaimi

Amjad

Russo

et al. 2020

Structural Health Monitoring

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fiber optic sensors have also been used for adhesive bond health monitoring that, integrated in the structure, can measure the shear stress at different positions, detect the presence of disbands, and evaluate their length (Sulejmani et al, 2014). The use of Ultrasonic Guided Waves (UGW), such as Lamb Waves, is very attractive for an efficient health monitoring system of large structures since they can propagate long distances in plates and shells with low attenuation (Staszewski, 2005;Kundu et al, 2019). In Carrino et al (2019a) the disbond size of an aluminum SLJ was correlated with the wavelength of S0 Lamb mode attenuated by interference phenomena in the adhesive region: the approach is bidimensional and this limitation does not affect the relevance of the work but on the other hand does not allow the simulation of more complex 3D models.…”

Section: Introductionmentioning

confidence: 99%

Non-linear Lamb Waves for Locating Defects in Single-Lap Joints

Nicassio

Carrino

Scarselli

2020

Front. Built Environ.

View full text Add to dashboard Cite

A novel method based on Non-linear Lamb waves behavior and Local Defect Resonance (LDR) is proposed for locating and evaluating disbonds in Single-Lap Joints (SLJ) typically used in aerospace industry. The presence of damages/defects such as disbonds leads to the presence of sub-and super-harmonics components in the frequency response. The maximum acoustic wave-damage interaction is reached by particular excitation frequencies that enhance the Non-linear response causing LDR. The LDR frequency is experimentally evaluated through the appearance of a single subharmonic component in the frequency spectrum of signals received by piezoelectric transducer (PZT) bonded on the structure. The Non-linear properties of Lamb waves are exploited to make defects generate subharmonic waves at LDR frequency. An algorithm is implemented for damage/defect localization that is accurately obtained by knowing PZTs positions, Time of Flight (ToF) and propagation properties of subharmonics packet. Several disbonds with different dimensions are artificially reproduced on an aluminum SLJ: experimental and FE results show good accordance both in usual (single damage) and critical (multi-damage) scenario. The paper proposes a baseline-free method for the disbonds detection, characterization and localization in SLJs that uses the PZT signals without affecting adhesive interface, thus allowing for an active health monitoring.

show abstract

“…Nonlinear ultrasonic techniques [20,21] were applied in [22] to study the dislocation density produced in AM components made through powder bed fusion (PBF) and laser engineered net shaping (LENS) techniques. Here, an interesting experimental setup and a promising theoretical model for the quantification of microstructural changes based on the analysis of the higher order harmonics of surface waves that propagate in the specimens were proposed [23].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Characterization of Components Manufactured by Direct Laser Metal Deposition

et al. 2020

View full text Add to dashboard Cite

Direct laser metal deposition (DLMD) is an innovative additive technology becoming of key importance in the field of repairing applications for industrial and aeronautical components. The performance of the repaired components is highly related to the intrinsic presence of defects, such as cracks, porosity, excess of dilution or debonding between clad and substrate. Usually, the quality of depositions is evaluated through destructive tests and microstructural analysis. Clearly, such methodologies are inapplicable in-process or on repaired components. The proposed work aims to evaluate the capability of ultrasonic techniques to perform the mechanical characterization of additive manufactured (AM) components. The tested specimens were manufactured by DLMD using a nickel-based superalloy deposited on an AISI 304 substrate. Ultrasonic goniometric immersion tests were performed in order to mechanical characterize the substrate and the new material obtained by AM process, consisting of the substrate and the deposition. Furthermore, the relationship was evaluated between the acoustic and the mechanical properties of the AM components and the deposition process parameters and the geometrical characteristics of multiclad depositions, respectively. Finally, the effectiveness of the proposed non-destructive experimental approach for the characterization of the created deposition anomalies has been investigated.

show abstract

Fundamentals of Nonlinear Acoustical Techniques and Sideband Peak Count

Cited by 38 publications

References 114 publications

Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques

Monitoring damage in composite plates from crack initiation to macro-crack propagation combining linear and nonlinear ultrasonic techniques

Non-linear Lamb Waves for Locating Defects in Single-Lap Joints

Ultrasonic Characterization of Components Manufactured by Direct Laser Metal Deposition

Contact Info

Product

Resources

About