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87 ©2023 ANSYS, Inc. Ramberg-Osgood Model • Nonlinear isotropic elastic material - no history/path dependence - loading path = unloading path • Describes the nonlinear plastic behavior of ductile metals (monotonic loading) - yield strength - isotropic hardening (power law) • Supports three-dimensional stress states, Plane strain and axisymmetric stress conditions • Post-processing - back-calculation of pseudo linear(elastic) and nonlinear(plastic) strains - split strain energy density into linear (SEND:ELAS) and nonlinear parts (SEND:PLAS) von Mises plasticity Ramberg-Osgood S,EQV EPPL,EQV