Buckling of lipidic ultrasound contrast agents under quasi-static load

Abstract

Collapse of lipidic ultrasound contrast agents under high-frequency compressive load has been historically interpreted by the vanishing of surface tension. By contrast, buckling of elastic shells is known to occur when costly compressible stress is released through bending. Through quasi-static compression experiments on lipidic shells, we analyze the buckling events in the framework of classical elastic buckling theory and deduce the mechanical characteristics of these shells. They are then compared to that obtained through acoustic characterization.

References in corpus (8)

• The Extreme Mechanics of Viscoelastic Metamaterials
• Experimental and numerical evidence of intensified non-linearity at the micro and nano scale: The lipid coated acoustic bubble
• Feedback-controlled microbubble generator producing one million monodisperse bubbles per second
• Buckling instability causes inertial thrust for spherical swimmers at all scales
• Secondary polygonal instability of buckled spherical shells
• Radial dynamics of an encapsulated microbubble with interface energy
• Delayed buckling of spherical shells due to viscoelastic knockdown of the critical load
• Post-buckling Dynamics of Spherical Shells