Developing a high-fidelity knowledge base for improvements in the non-destructive testing of advanced composite material products

Gandhi, Nikita; Rose, Rob; Croxford, Anthony J.; Ward, Carwyn

doi:10.1016/j.promfg.2020.10.049

Cited by 2 publications

(2 citation statements)

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“…Compared with their metallic counterparts, composite laminates possess unique characteristics and demonstrate complex fracture and fatigue behavior. For several decades, NDE methods were broadly used for inspecting thin composite laminates [1,[3][4][5][6][7][8][9][10]. However, introducing thick laminated structures, mainly in marine applications, created new challenges in NDE.…”

Section: Introductionmentioning

confidence: 99%

“…The primary components of a metamaterial are unit cells at sub-wavelength scales that make it possible to consider an AMM to be a continuum medium [3]. Based on their extraordinary properties, AMMs found many applications in acoustic engineering, such as superlens [4], acoustic cloaking [5], waveguiding [6], wave filtration [7], wave amplification, and wave enhancement [8].…”

Section: Introductionmentioning

confidence: 99%

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Application of Acoustic Metamaterials in Pulse-Echo Ultrasonic Evaluation of Thick Hybrid Composite Laminates

2023

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Significant challenges exist in inspecting thick composite laminates for manufacturing defects and operational damage. This is due to acoustic attenuation and impedance mismatch at the interface between the different composite layers. An innovative concept for enhancing ultrasonic testing of such composite laminates is introduced in this study. The proposed solution exploits the ability of acoustic metamaterials to cloak virgin composite. Herein, we show that by incorporating carefully designed metamaterials in a pulse-echo ultrasonic testing setup, the position and size of a delamination in a thick hybrid composite laminate can be determined accurately.

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