Patent ID: 7415398

Claim:
A method of simulating deformation of a viscoelastic material in which filler is blended to a matrix made of resin or rubber, the method comprising the steps of: dividing the viscoelastic material into a finite number of elements to form a viscoelastic material model; the step of dividing including the steps of dividing the matrix into a finite number of elements to form a matrix model, dividing at least one filler into a finite number of elements to form a filler model, and disposing an interface model surrounding the filler model between the matrix model and the filler model, the interface model having a viscoelastic property being different from the matrix model and having a thickness of from 1 to 20 nm; wherein the matrix model is defined with a relationship of stress and strain expressed as: S ∇ ij = - p . ⁢ ⁢ δ ij + R ijkl ⁢ ɛ . kl ⁢ ⁢ where R ijkl = 1 3 ⁢ C R ⁢ N ⁢ { ( ξ c N - β c λ c ) ⁢ B ij ⁢ B kl B mm + β c λ c ⁢ ( δ ik ⁢ B jl + B ik ⁢ δ jl ) } C R = n · k B · T (n: number of molecular chains per unit volume; k B : Boltzmann constant; T: absolute temperature) N: average segment number per one molecular chain ξ c = β c 2 1 - β c 2 ⁢ csc ⁢ ⁢ h 2 ⁢ β c ⁢ ⁢ p . = - K ⁢ ⁢ ɛ . mm ⁢ ⁢ K = ψ ⁢ ⁢ max ⁢ ⁢ ( R ijkl ) β c = L - 1 ⁡ ( λ c N ) ⁢ ⁢ λ c 2 = 1 3 ⁢ ( λ 1 2 + λ 2 2 + λ 3 2 ) λ 1 2 +λ 2 2 +λ 3 2 =I 1 , I 1 ; primary invariable quantity of strain B ij : left Cauchy-Green deformation tensor performing deformation calculation of the viscoelastic material model based on a predetermined condition; acquiring physical amount from the deformation calculation; and providing a display of the physical amount.