The stress strain relationship of liquid marbles under compression
Liquid marbles can be characterized using elastic solid models consisting of a liquid surrounded by a soft solid membrane. The elastic properties of liquid marbles determine the amount of compression under a given external force. This is an important property as the elasticity of liquid marbles determines their morphology under a given stress. We show that the stress strain relationship of liquid marbles can be described by s*Bo=0.6[1/(1 ehro)2 1] where Bo is the Bond number, s* is the normalised stress, and ehr0 is the strain measured with respect to the equivalent radius of the liquid marble. This stress strain relationship could pave the way for the development of microfluidic devices with robust liquid marbles.