Application of quasi-linear viscoelasticity for the characterisation of human buttocks adipose tissue

The mechanical properties of the human buttocks adipose tissue were investigated theoretically. The material properties obtained from the stress relaxation test were fitted to with a new algorithm using Fung's quasilinear viscoelastic (QLV) model with Prony series in conjunction with a hyperelastic model. The model was applied to fit the stress-time data during both the ramp and relaxation phases. By using the material properties obtained from the stress relaxation test, a numerical model was developed and the data from the model was fitted to Polynomial, Ogden and Exponential hyperelastic strain energy density (SED) function. It was found that, the QVL with the Polynomial SED function could predict the peak stress better than the other SED functions.