Identification of Multiple Cracks in Composite Laminated Beams Using Perturbation to Dynamic Equilibrium
| Autor: | Lu Qitian, Aimin Deng, Maosen Cao, Wei Xu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Laser scanning multiple crack identification Acoustics Chemical technology laser scanning Composite number Isotropy Equations of motion TP1-1185 Biochemistry Atomic and Molecular Physics and Optics Article Analytical Chemistry Transverse plane composite laminated beam Normal mode Laser scanning vibrometry Electrical and Electronic Engineering non-contact vibration measurement Instrumentation Dynamic equilibrium perturbation to dynamic equilibrium |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 21 Issue 18 Sensors, Vol 21, Iss 6171, p 6171 (2021) |
| ISSN: | 1424-8220 |
| Popis: | Identification of cracks in beam-type components is significant to ensure the safety of structures. Among the approaches relying on mode shapes, the concept of transverse pseudo-force (TPF) has been well proved for single and multiple crack identification in beams made of isotropic materials however, there is a noticeable gap between the concept of TPF and its applications in composite laminated beams. To fill this gap, an enhanced TPF approach that relies on perturbation to dynamic equilibrium is proposed for the identification of multiple cracks in composite laminated beams. Starting from the transverse equation of motion, this study formulates the TPF in a composite laminated beam for the identification of multiple cracks. The capability of the approach is numerically verified using the FE method. The applicability of the approach is experimentally validated on a carbon fiber-reinforced polymer laminated beam with three cracks, the mode shapes of which are acquired through non-contact vibration measurement using a scanning laser vibrometer. In particular, a statistic manner is utilized to enable the approach to be feasible to real scenarios in the absence of material and structural information besides, an integrating scheme is utilized to enable the approach to be capable of identifying cracks even in the vicinity of nodes of mode shapes. |
| Databáze: | OpenAIRE |
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