“…Depending on the strain amplitude, there exist different regimes in which the variation of the resonance frequency with strain is dominated by classical nonlinearity, slow dynamics, or both [21,22]. These observations have been described theoretically through a number of models derived from 1D theory of elasticity [13,15,[23][24][25]. However, as soon as the geometry of the sample or testing conditions deviate from the 1D assumption, these models are no longer applicable [6,26].…”