Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method

Delamination damage is one of the most critical damage modes of composite materials. It takes place through the thickness of the laminated composites and does not show subtle surface effects. In the present study, a delamination detection approach based on equivalent von Mises strains is demonstrate...

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Main Authors: Faraz Ganjdoust, Adnan Kefal, Alexander Tessler
Format: Article
Language:English
Published: MDPI AG 2023-09-01
Series:Sensors
Subjects:
Online Access:https://www.mdpi.com/1424-8220/23/18/7926
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author Faraz Ganjdoust
Adnan Kefal
Alexander Tessler
author_facet Faraz Ganjdoust
Adnan Kefal
Alexander Tessler
author_sort Faraz Ganjdoust
collection DOAJ
description Delamination damage is one of the most critical damage modes of composite materials. It takes place through the thickness of the laminated composites and does not show subtle surface effects. In the present study, a delamination detection approach based on equivalent von Mises strains is demonstrated for vibrating laminated (i.e., unidirectional fabric) composite plates. In this context, the governing relations of the inverse finite element method were recast according to the refined zigzag theory. Using the in situ strain measurements obtained from the surface and through the thickness of the composite shell, the inverse analysis was performed, and the strain field of the composite shell was reconstructed. The implementation of the proposed methodology is demonstrated for two numerical case studies associated with the harmonic and random vibrations of composite shells. The findings of this study show that the present damage detection method is capable of real-time monitoring of damage and providing information about the exact location, shape, and extent of the delamination damage in the vibrating composite plate. Finally, the robustness of the proposed method in response to resonance and extreme load variations is shown.
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spelling doaj.art-fe80e358694e42e3a67524a87af2d19a2023-11-19T12:56:09ZengMDPI AGSensors1424-82202023-09-012318792610.3390/s23187926Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element MethodFaraz Ganjdoust0Adnan Kefal1Alexander Tessler2Faculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, TurkeyFaculty of Engineering and Natural Sciences, Sabanci University, Tuzla, Istanbul 34956, TurkeyStructural Mechanics and Concepts Branch, NASA Langley Research Center, Mail Stop 190, Hampton, VA 23681-2199, USADelamination damage is one of the most critical damage modes of composite materials. It takes place through the thickness of the laminated composites and does not show subtle surface effects. In the present study, a delamination detection approach based on equivalent von Mises strains is demonstrated for vibrating laminated (i.e., unidirectional fabric) composite plates. In this context, the governing relations of the inverse finite element method were recast according to the refined zigzag theory. Using the in situ strain measurements obtained from the surface and through the thickness of the composite shell, the inverse analysis was performed, and the strain field of the composite shell was reconstructed. The implementation of the proposed methodology is demonstrated for two numerical case studies associated with the harmonic and random vibrations of composite shells. The findings of this study show that the present damage detection method is capable of real-time monitoring of damage and providing information about the exact location, shape, and extent of the delamination damage in the vibrating composite plate. Finally, the robustness of the proposed method in response to resonance and extreme load variations is shown.https://www.mdpi.com/1424-8220/23/18/7926delamination damagevibrationslaminated composite shellsinverse finite element methodrefined zigzag theory
spellingShingle Faraz Ganjdoust
Adnan Kefal
Alexander Tessler
Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method
Sensors
delamination damage
vibrations
laminated composite shells
inverse finite element method
refined zigzag theory
title Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method
title_full Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method
title_fullStr Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method
title_full_unstemmed Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method
title_short Delamination Detection and Localization in Vibrating Composite Plates and Shells Using the Inverse Finite Element Method
title_sort delamination detection and localization in vibrating composite plates and shells using the inverse finite element method
topic delamination damage
vibrations
laminated composite shells
inverse finite element method
refined zigzag theory
url https://www.mdpi.com/1424-8220/23/18/7926
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