Toward Composite Damage Classification Using in Situ Wavenumber-Frequency Modal Decomposition of Acoustic Emissions

Rosalie, Cedric; Rajic, Nik; Velden, Stephen van der; Rose, L. R. F.; Smithard, Joel; Chiu, Wing Kong

doi:10.1007/978-3-030-64594-6_63

Cited by 1 publication

(2 citation statements)

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“…A new sensing approach for detecting acoustic emission (AE) called linear array for modal decomposition and analysis or LAMDA was recently reported [1]. LAMDA is capable of determining the AE source location and potentially also the type of damage via modal signature analysis [2,3]. LAMDA, which builds on earlier work in acoustic-wave-mode separation [4][5][6], incorporates a flexible multi-element array coupled with a high-bandwidth interrogation device [7].…”

Section: Introductionmentioning

confidence: 99%

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Improving the performance of a lamb wave sensing array via relaxor ferroelectric single crystal transduction

Schipper¹

2023

Materials Research Proceedings

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Abstract. This paper reports on the potential use of relaxor ferroelectric single crystal (RFSC) transduction to improve the sensitivity of the thin film multi-element Lamb wave sensor called LAMDA (linear array for modal decomposition and analysis). The previously reported LAMDA sensor was created using a high-density multi-element polyvinylidene fluoride (PVDF) electro-polymer sensing array. The electromechanical coupling factor k=d⁄√(ε^T*s^E ), which is proportional to the piezoelectric coefficient d, is considered important for an ultrasonic receiver such as LAMDA. Comparing the PVDF piezoelectric coefficient d31 ≈ 14 pC/N with that of a recent RFSC [011] Pb(Mg1/3Nb2/3)O3-Pb(Zr,Ti)O3 (or Mn-PMN-PZT) having d32 ≈ -1100 pC/N, suggests the replacement of the PVDF array with a RFSC array could lead to a significant improvement in the sensitivity of the LAMDA sensor and consequently broaden the scope of its potential application to structural health monitoring. To this end, multiphysics modelling has been performed which indicates a five-fold increase in signal voltage output from a Mn-PMN-PZT based RFSC LAMDA compared with the original PVDF LAMDA. Model predictions for both RFSC LAMDA and PVDF LAMDA sensors will be reported, compared, and discussed.

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Section: Introductionmentioning

confidence: 99%

“…The electrical response produced by a LAMDA sensor (i.e. in response to the acoustic plate waves) can be used to locate and potentially quantify a mechanical impact, including any resulting structural damage [2]. LAMDA is thus a powerful new approach for structural health monitoring [9].…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of a lamb wave sensing array via relaxor ferroelectric single crystal transduction

Schipper¹

2023

Materials Research Proceedings

View full text Add to dashboard Cite

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Toward Composite Damage Classification Using in Situ Wavenumber-Frequency Modal Decomposition of Acoustic Emissions

Cited by 1 publication

References 15 publications

Improving the performance of a lamb wave sensing array via relaxor ferroelectric single crystal transduction

Improving the performance of a lamb wave sensing array via relaxor ferroelectric single crystal transduction

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