Patent ID: 7130748
Filing Date: 2006-10-31
Classification: G06F

Abstract:
1. A simulation method of estimating performance of a product made of a viscoelastic material, comprising the steps of: momently measuring a value of each of a strain, a strain speed, and a stress generated in said viscoelastic material in a measuring condition equivalent to a condition in which said product composed of said viscoelastic material is actually used; deriving time history data of a viscous drag of said viscoelastic material from time history data of each of said strain, said strain speed, and said stress and a viscoelastic model in which a viscosity of said viscoelastic material is considered, thereby deriving a relationship among said strain, said strain speed, and said viscous drag; in estimating the performance of said product set as a product model whose performance is analyzed and made of said viscoelastic material, said product model is divided into a large number of elements, said relationship is inputted to said product model, and an analysis is executed by a finite element method in consideration of a change of said viscous drag in dependence on a variation of said strain and said strain speed; resolving said strain and said strain speed of an entire coordinate system generated in each element into deviation components and volume components, and converting said strain and said strain speed of said deviation components from said entire coordinate system into a main strain coordinate system and a main strain speed coordinate systems respectively; and determining a viscous drag for a coordinate axis of each of said main strain coordinate system and said main strain speed coordinate system by using a converted deviation main strain and a converted deviation main strain speed.