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arXiv 2104.06647cond-mat.softphysics.class-phphysics.flu-dyn
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球壳的后屈曲动力学

Post-buckling Dynamics of Spherical Shells

Marcel Mokbel, Adel Djellouli, Catherine Quilliet, Sebastian Aland, Gwennou Coupier

摘要:

我们探索的内在动力学的球壳浸没在流体中的屈曲状态附近,通过实验和三维轴对称模拟。该结果得到了理论模型的支持,该模型准确地将屈曲壳描述为仅两个变量的振荡器。我们量化的有效“软化”的壳以上的屈曲阈值,在最近的实验中观察到封装的微泡和声波之间的相互作用。在邻近流体中的主要耗散机制也得到了证实。

英文摘要:

We explore the intrinsic dynamics of spherical shells immersed in a fluid in the vicinity of their buckled state, through experiments and 3D axisymmetric simulations. The results are supported by a theoretical model that accurately describes the buckled shell as a two-variable-only oscillator. We quantify the effective "softening" of shells above the buckling threshold, as observed in recent experiments on interactions between encapsulated microbubbles and acoustic waves. The main dissipation mechanism in the neighboring fluid is also evidenced.

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