Design optimisation and validation of phononic crystal plates for manipulation of elastodynamic guided waves / Saeid Hedayatrasa.
Hedayatrasa, Saeid, author.
2018
TK7871.15.M48
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Title
Design optimisation and validation of phononic crystal plates for manipulation of elastodynamic guided waves / Saeid Hedayatrasa.
Author
Hedayatrasa, Saeid, author.
ISBN
9783319729596 (electronic book)
3319729594 (electronic book)
9783319729589
DOI
https://doi.org/10.1007/978-3-319-72959-6
Published
Cham, Switzerland : Springer, 2018.
Language
English
Description
1 online resource.
Item Number
10.1007/978-3-319-72959-6 doi
Call Number
TK7871.15.M48
Dewey Decimal Classification
620.1/1
Summary
This thesis proposes novel designs of phononic crystal plates (PhPs) allowing ultra-wide controllability frequency ranges of guided waves at low frequencies, with promising structural and tunability characteristics. It reports on topology optimization of bi-material-layered (1D) PhPs allowing maximized relative bandgap width (RBW) at target filling fractions and demonstrates multiscale functionality of gradient PhPs. It also introduces a multi-objective topology optimization method for 2D porous PhPs allowing both maximized RBW and in-plane stiffness and addresses the critical role of considering stiffness in designing porous PhPs. The multi-objective topology optimization method is then expanded for designing 2D porous PhPs with deformation induced tunability. A variety of innovative designs are introduced which their maximized broadband RBW is enhanced by, is degraded by or is insensitive to external finite deformation. Not only does this book address the challenges of new topology optimization methods for computational design of phononic crystals; yet, it demonstrated the suitability and applicability of the topological designs by experimental validation. Furthermore, it offers a comprehensive review of the existing optimization-based approaches for the design of finite non-periodic acoustic metamaterial structures, acoustic metamaterial lattice structures and acoustic metamaterials under perfect periodicity.
Note
"Doctoral thesis accepted by University of South Australia, Adelaide, Australia."
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Digital File Characteristics
text file PDF
Source of Description
Online resource; title from PDF title page (viewed January 15, 2018).
Series
Springer theses.
Available in Other Form
Print version: 9783319729589
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Background and Research Scope
Literature Review and Research Objectives
Optimisation Framework Formulation.- Optimisation of Bi-Material Layered 1D Phononic Crystal Plates (PhPs).-Optimisation of Porous 2D PhPs with Respect to In Stiffness.- Optimisation of Porous 2D PhPs: Topology Refinement Study and other Aspect Ratios.- Optimisation of Porous 2D PhPs for Deformation- Induced Tunability
Experimental Validation of Optimised Porous 2D PhPs.- Conclusions and Recommendations for Future Work.

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