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Damage evaluation based on a wave energy flow map using multiple PZT sensors.

Liu Y, Hu N, Xu H, Yuan W, Yan C, Li Y, Goda R, Alamusi EY, Qiu J, Ning H, Wu L - Sensors (Basel) (2014)

Bottom Line: A new wave energy flow (WEF) map concept was proposed in this work.Based on it, an improved technique incorporating the laser scanning method and Betti's reciprocal theorem was developed to evaluate the shape and size of damage as well as to realize visualization of wave propagation.The results show that it can effectively evaluate the shape and size of damage from wave field variations around the damage in the WEF map.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Chiba University, Chiba 263-8522, Japan. liuyaolu@graduate.chiba-u.jp.

ABSTRACT
A new wave energy flow (WEF) map concept was proposed in this work. Based on it, an improved technique incorporating the laser scanning method and Betti's reciprocal theorem was developed to evaluate the shape and size of damage as well as to realize visualization of wave propagation. In this technique, a simple signal processing algorithm was proposed to construct the WEF map when waves propagate through an inspection region, and multiple lead zirconate titanate (PZT) sensors were employed to improve inspection reliability. Various damages in aluminum and carbon fiber reinforced plastic laminated plates were experimentally and numerically evaluated to validate this technique. The results show that it can effectively evaluate the shape and size of damage from wave field variations around the damage in the WEF map.

No MeSH data available.


Related in: MedlinePlus

Experimental images of Lamb waves (time = 70 μs) using previous technique [19–21] for the aluminum plate with an elliptical through-hole: (a) PZT-1; (b) PZT-2; (c) PZT-3.
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f3-sensors-14-01902: Experimental images of Lamb waves (time = 70 μs) using previous technique [19–21] for the aluminum plate with an elliptical through-hole: (a) PZT-1; (b) PZT-2; (c) PZT-3.

Mentions: For comparison, at 70 μs, the snapshots of Lamb wave propagation from the PZTs 1, 2 and 3 obtained by the previous technique [19–21] are presented in Figure 3. By observing the wave scattering caused by the elliptical through hole in visualized wave propagation images, the position of the damage can be easily identified. However, the shape and size of damage area cannot be evaluated.


Damage evaluation based on a wave energy flow map using multiple PZT sensors.

Liu Y, Hu N, Xu H, Yuan W, Yan C, Li Y, Goda R, Alamusi EY, Qiu J, Ning H, Wu L - Sensors (Basel) (2014)

Experimental images of Lamb waves (time = 70 μs) using previous technique [19–21] for the aluminum plate with an elliptical through-hole: (a) PZT-1; (b) PZT-2; (c) PZT-3.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3958263&req=5

f3-sensors-14-01902: Experimental images of Lamb waves (time = 70 μs) using previous technique [19–21] for the aluminum plate with an elliptical through-hole: (a) PZT-1; (b) PZT-2; (c) PZT-3.
Mentions: For comparison, at 70 μs, the snapshots of Lamb wave propagation from the PZTs 1, 2 and 3 obtained by the previous technique [19–21] are presented in Figure 3. By observing the wave scattering caused by the elliptical through hole in visualized wave propagation images, the position of the damage can be easily identified. However, the shape and size of damage area cannot be evaluated.

Bottom Line: A new wave energy flow (WEF) map concept was proposed in this work.Based on it, an improved technique incorporating the laser scanning method and Betti's reciprocal theorem was developed to evaluate the shape and size of damage as well as to realize visualization of wave propagation.The results show that it can effectively evaluate the shape and size of damage from wave field variations around the damage in the WEF map.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Chiba University, Chiba 263-8522, Japan. liuyaolu@graduate.chiba-u.jp.

ABSTRACT
A new wave energy flow (WEF) map concept was proposed in this work. Based on it, an improved technique incorporating the laser scanning method and Betti's reciprocal theorem was developed to evaluate the shape and size of damage as well as to realize visualization of wave propagation. In this technique, a simple signal processing algorithm was proposed to construct the WEF map when waves propagate through an inspection region, and multiple lead zirconate titanate (PZT) sensors were employed to improve inspection reliability. Various damages in aluminum and carbon fiber reinforced plastic laminated plates were experimentally and numerically evaluated to validate this technique. The results show that it can effectively evaluate the shape and size of damage from wave field variations around the damage in the WEF map.

No MeSH data available.


Related in: MedlinePlus