کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
295004 | 511510 | 2015 | 5 صفحه PDF | دانلود رایگان |
• Mechanical impedance resonance shift was induced by moving a proof mass on top of the structure.
• Mechanical impedance resonance shift changes due to difference in cross sectional area of structure.
• This change can be reflected by measuring the real-time electrical impedance of PZT sensor.
• The proposed method is simple and accurate because no baseline is required to identify the defect.
A simple and low cost method for structural health monitoring of honeycomb composite shaped in cantilever beam was reported. A lead zirconate titanate (PZT) sensor was attached to the cantilever beam and vibrated resonantly. The real-time imaginary part of electrical impedance of PZT sensor was measured to correlate with the induced mechanical impedance resonance shift of cantilever beam when a proof mass was moved on top of cantilever beam. When a defect was present, it caused a disrupted change of imaginary part of electrical impedance. Such detection is real-time so that no baseline is required to identify the defect accurately.
Journal: NDT & E International - Volume 76, December 2015, Pages 61–65