Composite Skin/Stringer Panel Damage Detection Based on Modal Strain Energy and Neural Network Technique

Jia Hui; Xiao Peng Wan; Mei Ying Zhao

doi:10.4028/www.scientific.net/AMM.66-68.322

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 66-68Composite Skin/Stringer Panel Damage Detection...

Composite Skin/Stringer Panel Damage Detection Based on Modal Strain Energy and Neural Network Technique

Abstract:

This paper proposed a new method to detect the damage of composite skin/stringer panel structure using modal strain energy combined with neural network. The change ratio of element modal strain energy is choosen as damage indicator because of it’s highly sensitivity to the location and severity of structure damage. Neural network here play the role of a tool to indentity the damage according to the change ratio of modal strain energy. To achive this, a three layers neural network model is built and the BP arithmetic is used. The proposed method is validated using a numerical simulation of a composite skin/stringer panel with damages in some elements of its FEM mode, which are simulated by reducing elements’ material stiffness properties. The result shows that, this method is robust, accurate and highly efficient with the maximal error limited in 10%.

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Periodical:

Applied Mechanics and Materials (Volumes 66-68)

Pages:

322-327

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.66-68.322

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Online since:

July 2011

Authors:

Jia Hui, Xiao Peng Wan, Mei Ying Zhao

Keywords:

Damage Detection, Modal Analysis, Modal Strain Energy, Neural Network (NN)

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