Multiscale finite element analysis of elastic wave scattering from localized defects

This paper investigates the use of a multiscale finite element approach to study the interaction between elastic waves and localized defects. The analysis of wave–defect interaction is of fundamental importance for the development of ultrasonic non-destructive testing and SHM applications. The metho...

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Bibliographic Details
Published in:Finite elements in analysis and design 2014-10, Vol.88, p.1-15
Main Authors: Casadei, F., Rimoli, J.J., Ruzzene, M.
Format: Article
Language:English
Subjects:
Defects
Design engineering
Discretization
Elastic wave scattering
Elastic waves
Finite element method
Mathematical analysis
Mathematical models
Multiscale analysis
Nondestructive testing
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Summary:This paper investigates the use of a multiscale finite element approach to study the interaction between elastic waves and localized defects. The analysis of wave–defect interaction is of fundamental importance for the development of ultrasonic non-destructive testing and SHM applications. The method considered herein, known as Geometric Multiscale FEM, formulates multi-node elements which can model small geometrical features without resorting to excessive mesh refinements and without compromising the quality of the discretization in the uniform portion of the domain. The possibility of formulating libraries of damaged multiscale elements makes the method particularly appealing for conducting extensive parametric studies. •A multiscale FE method is used to study the interaction of elastic waves and defects.•The method allows to model small defects without requiring overly refined meshes.•Multiscale elements model irregular defects without compromising the grid׳s quality.•Libraries of damaged multiscale elements simplify the execution of parametric studies.
ISSN:0168-874X
1872-6925
DOI:10.1016/j.finel.2014.05.009