A Large Strain Isotropic Elasticity Model Based on Molecular Dynamics Simulations of a Metallic Glass

摘要: For an isotropic hyperelastic material, the free energy per unit reference volume, ψ, may be expressed in terms of function ψ = ¯ ψ(E) logarithmic elas- tic strain E ln V. We have conducted numerical experiments using molecular dynamics simulations a metallic glass to develop following simple specialized form for circumstances which one might encounter large volumetric tr ,b ut shear √ 2|E0| (with E0 deviatoric part E) is small but not infinitesimal: μ(tr |E0| 2 + g(tr E), with μr − (μr μ0) exp � r , and