Abstract
A model for encapsulated bubble (EB) used in ultrasonic therapy is presented discussing EB's finite amplitude oscillation and rupture under high intensity ultrasound drive. The shell of EB, which is the key to EB dynamics, is treated as a layer of viscoelastic material and its large deformation and stress are expressed analytically. By introducing the critical tolerable stress of the shell material, the threshold drive pressure for the rupture of an EB can be calculated in the framework of the model. The oscillation of an EB on the verge of its rupture is simulated and the results are in agreement with the reported experimental data. The relationship between the drive frequency and EB's rupture is also investigated.
Published Version
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