Temperature affected guided wave propagation in a composite plate complementing the Open Guided Waves Platform

Moll, Jochen; Kexel, Christian; Pötzsch, Serena; Rennoch, Marcel; Herrmann, Axel S.

doi:10.1038/s41597-019-0208-1

Cited by 43 publications

(46 citation statements)

References 22 publications

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“…[ 11 ]). A reference dataset from the Open Guided Waves platform is used in this work, consisting of GW measurements performed with an array of piezoelectric transducers on a carbon fibre-reinforced polymer (CFRP) under varying temperatures [ 12 ]. The analysis shows that a classification rate of 96.2% can be achieved, demonstrating reliable and automated damage detection.…”

Section: Introductionmentioning

confidence: 99%

Towards Interpretable Machine Learning for Automated Damage Detection Based on Ultrasonic Guided Waves

Schnur

Goodarzi

Lugovtsova

et al. 2022

Sensors

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Data-driven analysis for damage assessment has a large potential in structural health monitoring (SHM) systems, where sensors are permanently attached to the structure, enabling continuous and frequent measurements. In this contribution, we propose a machine learning (ML) approach for automated damage detection, based on an ML toolbox for industrial condition monitoring. The toolbox combines multiple complementary algorithms for feature extraction and selection and automatically chooses the best combination of methods for the dataset at hand. Here, this toolbox is applied to a guided wave-based SHM dataset for varying temperatures and damage locations, which is freely available on the Open Guided Waves platform. A classification rate of 96.2% is achieved, demonstrating reliable and automated damage detection. Moreover, the ability of the ML model to identify a damaged structure at untrained damage locations and temperatures is demonstrated.

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Section: Introductionmentioning

confidence: 99%

Towards Interpretable Machine Learning for Automated Damage Detection Based on Ultrasonic Guided Waves

Schnur

Goodarzi

Lugovtsova

et al. 2022

Sensors

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“…This was confirmed experimentally. We can cite, for example, structural health monitoring related to concrete and composite structures (Wang et al 2018 ; Moll et al 2019 ).…”

Section: Methodsmentioning

confidence: 99%

Contribution to COVID-19 spread modelling: a physical phenomenological dissipative formalism

Limam

Limam²

2020

Biomech Model Mechanobiol

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In this study, we propose an evolution law of COVID-19 transmission. An infinite ordered lattice represents population. Epidemic evolution is represented by a wave-like free spread starting from a first case as an epicentre. Free energy of the virus on a given day is defined equal to the natural logarithm of active infected cases number. We postulate a form of free energy built using thermodynamics of irreversible processes in analogy to isotherm wave propagation in solids and non-local elastic damage behaviour of materials. The proposed expression of daily free energy rate leads to dissipation of propagation introducing a parameter quantifying measures taking by governments to restrict transmission. Entropy daily rate representing disorder produced in the initial system is also explicitly defined. In this context, a simple law of evolution of infected cases as function of time is given in an iterative form. The model predicts different effects on peak of infected cases I max and epidemic period, including effects of population size N, effects of measures taking to restrict spread, effects of population density and effect of a parameter T similar to absolute temperature in thermodynamics. Different effects are presented first. The model is then applied to epidemic spread in Tunisia and compared with data registered since the report of the first confirmed case on March 2, 2020. It is shown that the low epidemic size in Tunisia is essentially due to a low population density and relatively strict restriction measures including lockdown and quarantine.

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“…In particular, the measurements should be performed on specimens of different complexity in order to validate the wide range of numerical methods [10] and signal processing methods. In recent years, such data sets with different focus were provided, e.g., by Moll et al [11,12] and Marzani et al [13].…”

Section: Introductionmentioning

confidence: 99%

“…A 3D scanning laser Doppler vibrometer (SLDV) recorded the acoustic wave field on a spatial grid of measurement points. In addition, measurements from the SHM plate were taken based on an array of twelve piezoelectric transducers, see [11,12]. Both plates were made of carbon fibre reinforced plastics (CFRP).…”

Section: Introductionmentioning

confidence: 99%

Guided Waves for Damage Detection in Complex Composite Structures: The Influence of Omega Stringer and Different Reference Damage Size

et al. 2020

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The third dataset dedicated to the Open Guided Waves platform aims at carbon fiber composite plates with an additional omega stringer at constant temperature conditions. The two structures used in this work are representative for real aircraft components. Comprehensive measurements were recorded in order to study (I) the impact of the omega stringer on guided wave propagation, and (II) elliptical reference damages of different sizes located at three separate positions on the structure. Measurements were recorded for narrowband excitation (5-cycle toneburst with varying carrier frequencies) and broadband excitation (using chirp waveforms). The paper presents the results of a technical validation including numerical modelling, and enables further research, for example related to probability of detection (POD) analysis.

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Temperature affected guided wave propagation in a composite plate complementing the Open Guided Waves Platform

Cited by 43 publications

References 22 publications

Towards Interpretable Machine Learning for Automated Damage Detection Based on Ultrasonic Guided Waves

Towards Interpretable Machine Learning for Automated Damage Detection Based on Ultrasonic Guided Waves

Contribution to COVID-19 spread modelling: a physical phenomenological dissipative formalism

Guided Waves for Damage Detection in Complex Composite Structures: The Influence of Omega Stringer and Different Reference Damage Size

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