PSI - Issue 25

P.N. Lymperopoulos et al. / Procedia Structural Integrity 25 (2020) 172–179

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8 Panagiotis N. Lymperopoulos, Efstathios E. Theotokoglou, Ioannis A. Antoniadis / Structural Integrity Procedia 00 (2019) 000–000 5. Conclusion In this paper, a first study has been carried out in order to numerically analyse metamaterials. It can be concluded, that there are optimum dimensions for the pentamode’s rod in order to have similar behaviour with isolators. Our results are very close to results from other researchers, which have analytical approaches. It is also observed, that the pentamode configuration which is made with metallic materials should be used in the seismic protection design and aircraft structures, while the pentamodes which are manufactured from polymers is preferable that they should be used in biomechanics applications. In a future study, we will try to confront metamaterials used in aircraft structures and in static and dynamic loadings. Filippo Capolino,Theory and Phenomena of Metamaterials, Metamaterials Handbook, CRC Press, 2009 Chronopoulos D , Antoniadis I , Collet M , Ichchou M . Enhancement of wave damping within metamaterials having embedded negative stifness inclusions. Wave Motion. 2015;58:165-179. Sapountzakis J E , Syrimi G P , Pantazis A I , Antoniadis A I . KDamper concept in seismic isolation of bridges with exible piers. Engineering Structures. 2015;153:525-539. Shearer P. M., Introduction to Seismology, Second Edition, Cambridge University Press; 2009. Fabbrocino F ,Amendola A , Benzoni G , Fraternali F . Seismic Application Of Pentamode Lattices. International Journal of Earthquake Engineer ing;2015;Anno XXXIII;Num 1-2;62-71. Andrew N. Norris. Mechanics of elastic networks. Proceedings of the Royal Society of London A, 2014. Kadic M , Bueckmann T , Stenger N , Thiel M , Wegener M ., On the practicability of pentamode mechanical metamaterials. APPLIED PHYSICS LETTERS. 2012;100:(191901-1)-(191901-4). Amendola A., Benzoni G., Fraternali F.; Non-linear elastic response of layered structures, alternatingpentamode lattices and confinement plates;Composites Part B;2017;115;117-123 Amendola A , Carpentieri G , Feo L , Fraternali F . Bending dominated response of layered mechanical metamaterials alternating pentamode lattices and confinement plates. Composite structures. 2016;157:71-77. ANSYS. ANSYS APDL;. Available from: https: // www.ansys.com / academic / free-student-products, 2019. References