Forskningsoutput per år
Forskningsoutput per år
Anna Dalklint, Mathias Wallin, Katia Bertoldi, Daniel Tortorelli
Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review
Topology optimization is used to design phononic bandgap materials that are tunable by mechanical deformation. A periodic media is considered, which due to the assumption of length scale separation, allows the dispersion relations to be obtained by analyzing a single unit cell subjected to Floquet–Bloch boundary conditions. A finite macroscopic deformation is applied to the unit cell to affect its geometry and hence dispersion. We tune the dispersion–deformation relation to our liking by solving a topology optimization problem using nonlinear programming. The adjoint method is employed to compute the sensitivities, and the non-differentiability of degenerate eigenvalues is avoided using symmetric polynomials. Several tunable phononic crystal designs are presented. Also, a verification analysis is performed, wherein the optimized design is interpreted and analyzed using a conforming finite element mesh.
Originalspråk | engelska |
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Artikelnummer | 104849 |
Tidskrift | Journal of the Mechanics and Physics of Solids |
Volym | 163 |
DOI | |
Status | Published - 2022 |
Forskningsoutput: Avhandling › Doktorsavhandling (sammanläggning)