Wave Propagation Analysis in Composite Laminates Containing a Delamination Using a Three-Dimensional Spectral Element Method

A three-dimensional spectral element method (SEM) was developed for analysis of Lamb wave propagation in composite laminates containing a delamination. SEM is more efficient in simulating wave propagation in structures than conventional finite element method (FEM) because of its unique diagonal form...

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Bibliographic Details
Published in:Mathematical Problems in Engineering 2012-01, Vol.2012 (2012), p.616-634-439
Main Authors: Wang, Jinfu, Sun, Xuewei, Peng, Haikuo, Li, Fucai, Meng, Guang
Format: Article
Language:English
Subjects:
Composite materials
Composite structures
Computer simulation
Delaminating
Delamination
Exact solutions
Finite element analysis
Finite element method
Lamb waves
Laminates
Mass matrix
Mathematical analysis
Mathematical models
Matrix methods
Propagation modes
Spectral element method
Studies
Three dimensional analysis
Three dimensional composites
Transfer matrices
Wave propagation
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Summary:A three-dimensional spectral element method (SEM) was developed for analysis of Lamb wave propagation in composite laminates containing a delamination. SEM is more efficient in simulating wave propagation in structures than conventional finite element method (FEM) because of its unique diagonal form of the mass matrix. Three types of composite laminates, namely, unidirectional-ply laminates, cross-ply laminates, and angle-ply laminates are modeled using three-dimensional spectral finite elements. Wave propagation characteristics in intact composite laminates are investigated, and the effectiveness of the method is validated by comparison of the simulation results with analytical solutions based on transfer matrix method. Different Lamb wave mode interactions with delamination are evaluated, and it is demonstrated that symmetric Lamb wave mode may be insensitive to delamination at certain interfaces of laminates while the antisymmetric mode is more suited for identification of delamination in composite structures.
ISSN:1024-123X
1563-5147
DOI:10.1155/2012/659849