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. 2022 May 18;8(20):eabm4206. doi: 10.1126/sciadv.abm4206

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Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1. — (A) Schematic of the single FP resonator made by a composite rod. (B) Effective modulus of the composite rod as function of the scaling factor α. The solid line denotes the Young’s modulus E_c = B_w/α specified in the simulation, while the circles denote the effective longitudinal modulus, retrieved from the simulated output data. The inset figure shows the displacement field under the pressure load Δp. (C) Real part of the Green function, G(ω), with α = 1 and 5.5. The data are retrieved from simulations. The complete overlap of the two curves shows that the Green function is independent of the scaling parameter α. (D) Same for the imaginary part of the Green function.