ESTIMINATION OF UNKNOWN PARAMETERS IN MECHANICAL MODELS FOR DETERMINATION VISCOELASTICITY PROPERTIES OF MATERIALS

摘要

Estimination of unknown parameters in mechanistic models for determination viscoelasticity properties of gluing laminate elements is given in this paper. Three parameters model (Standard Linear Model) and four parameters model (Burger model) are analyzed according to experimental data. The analysis showed that Burger model better approximates experimental data. Convergence improvement of nonlinear regression method for estimation a of unknown parameters in models can be obtained by parameters grouping.