Hello,

I am a last year Ph.D student at University of Toronto. During my study, I developed MEMS force sensor-based micro-scale compression testing for micrometer-sized spherical biomaterials. I applied this system for mechanical properties characterization of polymeric hydrogel microsphere for drug delivery. I almost finished exprimental data acquisition and am trying to calculate mechanical properties such as Young's modulus and viscoelastic parameters using elastic and viscoelastic mechanics model. But I don't know which is the most appropriate mechanic model for describing this experimental situation. Could please help me to find any elastic and viscoelastic mechanis model for the polymeric hydrogel microsphere in wet state compressed by two rigid plates. And I would like to verify this experiment with FEM analysis using ANSYS. Does anybody know how to analysis this problem using FEM? 

Thank you for your kind help in advance.

Keekyoung Kim