COMBINED NUMERICAL AND ANALYTICAL DETERMINATION OF POISSON'S RATIO FOR VISCOELASTIC ISOTROPIC MATERIALS

摘要

The Laplace–Carson integral transform method and numerical inversion of the solutions are used to establish the relationship between hereditary kernels that define the scalar properties of isotropic linear viscoelastic materials in combined stress state. The hereditary creep kernel characterizing the behavior of the viscoelastic Poisson’s ratio with time is identified. The calculation of shear creep strains and transverse creep under uniaxial loading with allowance for the time-dependent Poisson’s ratio are experimentally validated.