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On the Nature of Pressure Wave Propagation through Ducts for Structural Health Monitoring Application

1
Department of Mechanical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
2
Environmental and Applied Fluid Dynamics Department, von Karman Institute for Fluid Dynamics, Chaussée de Waterloo 72, 1640 Rhode-Saint-Genèse, Belgium
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(5), 837; https://doi.org/10.3390/app9050837
Received: 19 January 2019 / Accepted: 20 January 2019 / Published: 26 February 2019
(This article belongs to the Section Acoustics and Vibrations)
An effective structural health monitoring system fully exploits the flexibility offered by the 3D printing process by integrating a smart structural health monitoring technology inside the 3D-printed components. The system relies on the propagation of pressure waves with constant propagation speed through circular capillaries embedded in the structure. The nature of these waves seems to be determinant for the accuracy of the crack localization system. To achieve a better physical understanding of the nature of the propagating waves through the capillaries, computational fluid dynamics simulations are performed and compared to experimental results obtained with a self-built test setup. The presence of propagating shock waves is observed in the simulations and experiments, as well as a complex reflection mechanism around the leak location. Shock waves show the characteristic of not propagating at a constant velocity. This property complicates the actual localization system. To solve this, the constant velocity assumption should be replaced with the effective velocity evolution to increase the localization accuracy. The amplitude of the shock wave is attenuated with propagating distance, which proves that the effect of friction plays an important role and can, in turn, influence the localization system. View Full-Text
Keywords: structural health monitoring; additive manufacturing; crack localization; shock wave propagation; acoustic pressure wave structural health monitoring; additive manufacturing; crack localization; shock wave propagation; acoustic pressure wave
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MDPI and ACS Style

Jardon, Z.; Hinderdael, M.; Regert, T.; Van Beeck, J.; Guillaume, P. On the Nature of Pressure Wave Propagation through Ducts for Structural Health Monitoring Application. Appl. Sci. 2019, 9, 837. https://doi.org/10.3390/app9050837

AMA Style

Jardon Z, Hinderdael M, Regert T, Van Beeck J, Guillaume P. On the Nature of Pressure Wave Propagation through Ducts for Structural Health Monitoring Application. Applied Sciences. 2019; 9(5):837. https://doi.org/10.3390/app9050837

Chicago/Turabian Style

Jardon, Zoé, Michaël Hinderdael, Tamas Regert, Jeroen Van Beeck, and Patrick Guillaume. 2019. "On the Nature of Pressure Wave Propagation through Ducts for Structural Health Monitoring Application" Applied Sciences 9, no. 5: 837. https://doi.org/10.3390/app9050837

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