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Conventional and star-shaped auxetic materials for the creation of band gaps

Koutsianitis Panagiotis, Tairidis Georgios, Drosopoulos Georgios, Stavroulakis Georgios

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/CE855A31-B0EC-484E-A7C4-EF47DC0D8575-
Αναγνωριστικόhttps://doi.org/10.1007/s00419-019-01594-1-
Αναγνωριστικόhttps://link.springer.com/article/10.1007%2Fs00419-019-01594-1-
Γλώσσαen-
Μέγεθος18 pagesen
ΤίτλοςConventional and star-shaped auxetic materials for the creation of band gapsen
ΔημιουργόςKoutsianitis Panagiotisen
ΔημιουργόςΚουτσιανιτης Παναγιωτηςel
ΔημιουργόςTairidis Georgiosen
ΔημιουργόςΤαϊριδης Γεωργιοςel
ΔημιουργόςDrosopoulos Georgiosen
ΔημιουργόςΔροσοπουλος Γεωργιοςel
ΔημιουργόςStavroulakis Georgiosen
ΔημιουργόςΣταυρουλακης Γεωργιοςel
ΕκδότηςSpringer Verlagen
ΠερίληψηA band gap region, or simply a band gap, is a range of frequencies where vibrations of certain frequency ranges are isolated. In the present paper, such ranges are sought through the study of different cases for the shape of the unit cells of a lattice, i.e., of an assembly of classical structural elements, such as beams and plates. A lattice with a specific, special designed microstructure is considered in the present investigation. Each particular cell of the examined lattice is studied as a classical composite material consisting of a matrix and the reinforcing core (e.g., matrix-fiber composite), and it is discretized by using two-dimensional plane stress finite elements. The form of the core of the unit cells can be of several shapes, e.g., quadratic, circular, and star. Some of these shapes provide the whole lattice with auxetic behavior, with negative Poisson’s ratio at the homogenized properties. The shape and the microstructure of the lattice is optimized in order to achieve isolation of the desired frequencies. A first attempt on the optimization of star-shaped microstructures is also presented. The optimization is carried out using powerful global optimization methods, such as the genetic algorithms. Results indicate that band gaps may appear in both conventional and auxetic microstructures. Moreover, the appearance and the size of the band gaps depend on the selected microstructure.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2020-04-03-
Ημερομηνία Δημοσίευσης2019-
Θεματική ΚατηγορίαAuxetic materialen
Θεματική ΚατηγορίαBand gapsen
Θεματική ΚατηγορίαOptimizationen
Θεματική ΚατηγορίαVibrationen
Βιβλιογραφική ΑναφοράP.I. Koutsianitis, G.K. Tairidis, G.A. Drosopoulos and G.E. Stavroulakis, "Conventional and star-shaped auxetic materials for the creation of band gaps," Arch. Appl. Mech., vol. 89, no. 12, pp. 2545-2562, Dec. 2019. doi: 10.1007/s00419-019-01594-1en

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