Patent ID: 9081921
Filing Date: 2015-07-14
Classification: B60C,G06F

Abstract:
1. A computerized method for simulating a rubber compound comprising a rubber matrix and filler particles to obtain a loss tangent of the rubber compound, comprising: generating a rubber compound model of the rubber compound, wherein the rubber matrix and the filler particles are each split into a finite number of elements; defining two different values of strain as deformation conditions of the rubber compound model; performing deformation simulations of the rubber compound model under said two different values of the strain, wherein said energy loss of each of the elements is an energy loss W per unit volume computed by the use of the following expression where S is the sum of said computed normal strain and said computed shear strain of the element concerned, E is a storage elastic modulus of the element concerned, εp is a variation of the strain of the element concerned to which said two different values of the strain are respectively applied, and δ is a loss tangent of the element concerned; and computing the loss tangent of the rubber compound by the use of the following expression where Wa is the sum of the energy losses W per unit volume of all of the elements, Ea is an elastic modulus of the rubber compound model, and εa is a strain amplitude caused by a difference between said two different values of the strain.