Smart Structures and Systems

  • 제3권4호
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  • Pages.439-454
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  • 2007
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

A pre-stack migration method for damage identification in composite structures

  • Zhou, L. (College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Yuan, F.G. (Department of Mechanical and Aerospace Engineering, North Carolina State University) ;
  • Meng, W.J. (College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics)
  • 투고 : 2006.03.02
  • 심사 : 2007.01.02
  • 발행 : 2007.10.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper a damage imaging technique using pre-stack migration is developed using Lamb (guided) wave propagation in composite structures for imaging multi damages by both numerical simulations and experimental studies. In particular, the paper focuses on the experimental study using a finite number of sensors for future practical applications. A composite laminate with a surface-mounted linear piezoelectric ceramic (PZT) disk array is illustrated as an example. Two types of damages, one straight-crack damage and two simulated circular-shaped delamination damage, have been studied. First, Mindlin plate theory is used to model Lamb waves propagating in laminates. The group velocities of flexural waves in the composite laminate are also derived from dispersion relations and validated by experiments. Then the pre-stack migration technique is performed by using a two-dimensional explicit finite difference algorithm to back-propagate the scattered energy to the damages and damages are imaged together with the excitation-time imaging conditions. Stacking these images together deduces the resulting image of damages. Both simulations and experimental results show that the pre-stack migration method is a promising method for damage identification in composite structures.

키워드

참고문헌

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피인용 문헌

  1. Validation and evaluation of damage identification using probability-based diagnostic imaging on a stiffened composite panel vol.26, pp.16, 2015, https://doi.org/10.1177/1045389X14549873
  2. Guided wave propagation in honeycomb sandwich structures using a piezoelectric actuator/sensor system vol.18, pp.12, 2009, https://doi.org/10.1088/0964-1726/18/12/125007
  3. Experimental study on identifying cracks of increasing size using ultrasonic excitation vol.11, pp.1, 2012, https://doi.org/10.1177/1475921711406581
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  5. Geometry Determination of a Foundation Slab Using the Ultrasonic Echo Technique and Geophysical Migration Methods vol.35, pp.1, 2016, https://doi.org/10.1007/s10921-016-0334-z
  6. Reverse Time Migration: A Seismic Imaging Technique Applied to Synthetic Ultrasonic Data vol.2012, 2012, https://doi.org/10.1155/2012/128465
  7. Stochastic DLV method for steel truss structures: simulation and experiment vol.14, pp.2, 2014, https://doi.org/10.12989/sss.2014.14.2.105
  8. Piezo-activated guided wave propagation and interaction with damage in tubular structures vol.6, pp.7, 2007, https://doi.org/10.12989/sss.2010.6.7.835