The role of modelling and simulation in the development of advanced non-destructive evaluation systems

Generazio, Edward R.; Harris, Charles E.

doi:10.1017/s0001924000064691

Cited by 5 publications

(2 citation statements)

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“…The main challenge is to adapt the probe to the material and the dimension of the block under inspection to reach the required sensitivity and resolution for the detection of cracks or other defects. Ultrasound beam computation is a critical step in the design process (Generazio & Harris, 1999) and depends on the size and the geometry of the emitting element, has been widely studied and can be computed through several methods, such as finite element (Chassignole et al, 2009) or ray tracing (Kolkoori et al, 2013). The ultrasonic testing sensitivity depends on the energy reflected from the flaws relative to a calibration (Cheeke, 2012).…”

Section: Introductionmentioning

confidence: 99%

Phased array probe for the inspection of large steel forgings

Dupont-Marillia

Jahazi²,

Bélanger³

2021

Cogent Engineering

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Reliable inspection of large steel forgings is a significant problem across multiple industries. When the dimensions of forgings are at least 1000 mm in each direction, ultrasonic phased array inspection becomes difficult because conventional probes are not designed to transmit and focus acoustic energy over such large distances. Using simulations and experiments, this article aims to discuss the possibilities and limitations of phased array imaging of large forged steel ingots. Simulations were used to design a transducer based on the reflected amplitude, as well as the lateral and axial resolutions of defects in a 1000 mm thick block. It was shown that when limiting the aperture to allow easy handling in an industrial inspection setting, the lateral resolution and the reflected amplitude were the main limitations. Increasing the element width maximizes the energy transmitted into the material, but it also moves elements away from each other, thus reducing the lateral resolution. Based on the simulations, an experimental phased array transducer was manufactured with eight elements of 9.25 × 22.5 mm. The probe was used to perform measurements and generate total focusing method images of three different at a depth of 370 mm in a 776 mm forged steel block.

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Section: Introductionmentioning

confidence: 99%

Phased array probe for the inspection of large steel forgings

Dupont-Marillia

Jahazi²,

Bélanger³

2021

Cogent Engineering

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“…Mathematical modeling and computer simulation methods with the current speed and versatility facilitate accurate solutions for structural analysis that closely approximates reality (Generazio and Harris, 1999). The traditional stationary random equivalent finite element models capture the global behavior of the component but generally are overly conservative to adequately predict the short duration dynamic behavior in critical areas of the structure.…”

Section: Introductionmentioning

confidence: 99%

Development of the shock simulation methodology for spacecraft components

Ensan¹,

Zimcik²

2012

Can. Aeronaut. Space J.

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Spacecraft components encounter mechanical shock from a variety of sources. Components must withstand a series of flight shock pulses and must be designed and tested accordingly to ensure reliability. This paper presents a ''Design for Shock'' methodology to accurately analyze the response to shock for components under the short duration dynamic loading to assess component structural integrity and demonstrate design robustness. This methodology uses a more realistic simulation of the response of the component to shock loading using a wave propagation solution based on explicit time integration of the transient shock event rather than a stationary random and (or) quasi-static approach which has been traditionally used for this analysis. This approach was applied to a sensitive scientific instrument to demonstrate its effectiveness. The method is shown to provide a more accurate simulation of the shock event thereby reducing the unknown conservatism of the stationary random and (or) quasi-static approach while providing accurate simulation of the transient dynamic response of the structure.Résumé. Les composants d'engins spatiaux subissent des chocs mécaniques de diverses sources. Les composants doivent résister à une série d'impulsions de choc en cours de vol et doivent ainsi être conçus et testés pour assurer leur fiabilité. Dans cet article, on présente une méthodologie « Design for Shock » pour analyser de façon précise la réponse au choc des composants sous l'influence d'une charge dynamique de courte durée afin d'évaluer l'intégrité structurale des composants et de démontrer la robustesse du design. Cette méthodologie utilise une simulation plus réaliste de la réponse du composant à la charge de choc en adoptant une solution de type propagation des ondes basée sur l'intégration temporelle explicite de l'évènement transitoire de choc plutô t qu'une approche aléatoire stationnaire et/ou quasi statique utilisée traditionnellement pour ce type d'analyse. Cette approche a été appliquée à un instrument scientifique sensible pour démontrer son efficacité. On démontre que la méthode procure une simulation plus précise de l'évènement de choc, réduisant ainsi le conservatisme inconnu de l'approche aléatoire stationnaire et (ou) quasi statique, tout en fournissant une simulation précise de la réponse dynamique transitoire de la structure. [Traduit par la Rédaction]

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