56. Multi-damage detection in composite structure

Yongming Feng1, Li Zhou2, Bo Ni3, Jianyuan Yang4, Weidong Chen5

1, 2State Key Laboratory of Mechanics and Control of Mechanical Structures,
Nanjing University of Aeronautics and astronautics, Nanjing, China

1, 3, 4, 5Beijing Aeronautical Technology Research Center, Beijing, China

1Corresponding author

E-mail: 1ymfeng@nuaa.edu.cn

(Received 12 June 2014; received in revised form 24 July 2014; accepted 7 September 2014)

Abstract. In this paper a pre-stack reverse-time migration concept of signal processing techniques is developed and adapted to guided-wave propagation in composite structure for multi‑damage imaging by experimental studies. An anisotropic laminated composite plate with a surface‑mounted linear piezoelectric ceramic (PZT) disk array is studied as an example. At first, Mindlin Plate Theory is used to model Lamb waves propagating in laminates. The group velocities of flexural waves are also derived from dispersion relations and validated by experiments. Then reconstruct the response wave fields with reflected data collected by the linear PZT array. Reverse‑time migration technique is then performed to back-propagate the reflected energy to the damages using a two‑dimensional explicit finite difference algorithm and damages are imaged. Stacking these images together gets the final image of multiple damages. The results show that the pre‑stack migration method is hopeful for damage detection in composite structures.

Keywords: multi-damage detection, structural health monitoring system (shms), composite structure, mindlin plate theory.

References

[1]        Boller C. Next generation structural health monitoring and its integration into aircraft design. International Journal of Systems Science, Vol. 31, Issue 11, 2000, p. 1333‑1349.

[2]        Liu P. L., Tsai C. D., Wu T. T. Imaging of surface-breaking concrete cracks using transient elastic wave. NDT&E International, Vol. 29, Issue 5, 1996, p. 323‑331.

[3]        Lin X., Yuan F. G. Damage detection of a plate using migration technique. Journal of Intelligent Material Systems and Structures, Vol. 12, Issue 7, 2001, p. 469‑482.

[4]        Lin X., Yuan F. G. Detection of multiple damages by prestack reverse-time migration. AIAA Journal, Vol. 39, Issue 11, 2001, p. 2206‑2215.

[5]        Lin X., Yuan F. G. Experimental Study of applying migration technique in structural health monitoring. Structural Health Monitoring: the demands and Challenges, CRC Press, 2001, p. 1311‑1320.

[6]        Wang L., Yuan F. G. Damage identification in a composite plate using prestack reverse-time migration technique. Structural Health Monitoring, Vol. 4, Issue 3, 2005, p. 195‑211.

[7]        Lih S. S., Mal A. K. On the accuracy of approximate plate theories for wave field calculations in composite laminates. Wave Motion, Vol. 21, Issue 1, 1995, p. 17‑34.

[8]        Lih S. S., Mal A. K. Response of multilayered composite laminates to dynamic surface loads. Composite Part B, Vol. 27B, Issue 6, p. 633‑641.

[9]        Sohn H., Park G., Wait J. R., Limback N. P., Farrar C. R. Wavelet-based active sensing for delamination detection in composite structures. Smart Materials and Structures, Vol. 13, Issue 1, 2004, p. 153‑160.

[10]     Chang W. F., McMechan G. A. Reverse-time migration of offset vertical seismic profiling data using the excitation-time imaging condition. Geophysics, Vol. 51, Issue 1, 1986, p. 67‑84.

Cite this article

Feng Yongming, Zhou Li, Ni Bo, Yang Jianyuan, Chen Weidong Multi-damage detection in composite structure. Journal of Measurements in Engineering, Vol. 2, Issue 3, 2014, p. 164‑172.

 

Journal of Measurements in Engineering. September 2014, Volume 2, Issue 3
JVE International Ltd. ISSN Print 2335-2124, ISSN Online 2424-4635, Kaunas, Lithuania