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Title: Detecting multiple small‑sized damage in beam‑type structures by teager energy of modal curvature shape
Authors: Xu, W
Cao, M
Radzieński, M
Xia, N
Su, Z 
Ostachowicz, W
Wang, S
Keywords: Teager energy
Modal curvature shape
Multiple small-sized damage
Damage detection
Mode shape
Composite beam
Fracture mechanics
Scanning laser vibrometer
Issue Date: 2015
Publisher: Vibromechanika
Source: Journal of vibroengineering, 2015, v. 17, no. 1, p. 275-286 How to cite?
Journal: Journal of vibroengineering 
Abstract: Detection of multiple damage using modal curvature has become a research focus of great significance in recent years. Nevertheless, a noticeable deficiency of modal curvature is its inadequacy in identifying small-sized damage, which usually results in damage signatures being obscured by the global fluctuation trend of modal curvature. To address this deficiency, this study develops a damage feature of Teager energy of modal curvature shape to identify multiple small sized damage against the global fluctuation trend of the modal curvature. The advantage of this damage feature over the traditional modal curvature in small-sized damage characterization is first verified in analytical cases of cracked beams with various types of boundary condition, and further validated in a cracked carbon-fiber-reinforced polymer composite beam with the mode shapes acquired using a scanning laser vibrometer.
ISSN: 1392-8716
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