On irregularity-based damage detection method for cracked beams

Jialai Wang; Pizhong Qiao

doi:10.1016/j.ijsolstr.2007.08.017

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On irregularity-based damage detection method for cracked beams

Journal article

Open access

Peer reviewed

On irregularity-based damage detection method for cracked beams

Jialai Wang and Pizhong Qiao

International journal of solids and structures, Vol.45(2), pp.688-704

2008

DOI: https://doi.org/10.1016/j.ijsolstr.2007.08.017

Handle:

https://hdl.handle.net/2376/106035

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Abstract

Mode shapes

Composites

Vibration

Damage detection

Beams

Irregularity

Structural health monitoring

Numerical filters

Crack

A new damage detection technique using irregularity profile of a structural mode shape is proposed in this paper. The mode-shape of a cracked beam is first obtained analytically by using a general function. Its irregularity profile is then extracted from the mode shape by a numerical filter. The location and size of the crack in the beam can be determined by the peak value appearing on the irregularity profile. Two types of numerical filters, i.e., triangular and Gaussian, are examined. It has been found that the former filter is more effective in damage detection than the latter one. Numerical simulations suggest that the irregularity-based method requires a relatively low measurement resolution. Noise stress tests are carried out to demonstrate the effectiveness and robustness of this method under the influence of noise. As a validation, the proposed method is applied to detect crack damage in an E-glass/epoxy laminated composite beam. The successful detection of the crack in the composite beam demonstrates that the irregularity-based method is capable of assessing both the location and size of the crack and can be used efficiently and effectively in damage identification and health monitoring of beam-type structures.

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Details

Title: On irregularity-based damage detection method for cracked beams
Creators: Jialai Wang - Department of Civil, Construction, and Environmental Engineering, The University of Alabama, Tuscaloosa, AL 35487-0205, USA
Pizhong Qiao - Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA
Publication Details: International journal of solids and structures, Vol.45(2), pp.688-704
Academic Unit: Civil and Environmental Engineering, Department of
Publisher: Elsevier Ltd
Identifiers: 99900547091201842
Language: English
Resource Type: Journal article