Defense Technical Information Center (DTIC) · 1973 · 22 citations · 0 references
EngineeringCivil EngineeringMaterials ScienceFinite Element AnalysisFinite Element MethodsStructural AnalysisDynamic Finite Element AnalysisPlastic AnalysisPlastic DeformationPlasticityStructural Finite Element AnalysisWork HardeningComputational PlasticityFinite Element Structural AnalysisHardening LawsIncremental PlasticityIsotropic HardeningKinematic HardeningPlastic Deformation SimulationWork Hardening Analysis
The report presents an evaluation of four hardening rules of the incremental theory of plasticity to determine which of the rules are better suited for use in finite element or finite difference structural analysis computer programs. The hardening rules considered are isotropic hardening, the Prager-Ziegler kinematic hardening rule, the Mroz model, and the mechanical sublayer model. Comparisons of experimental data with hardening rule predictions (from a total incremental plasticity formulation using the von Mises yield condition and associated flow rule) for simple loading paths are first considered. Next the computer storage requirements associated with each hardening rule are investigated. Finally, the two most promising hardening rules are incorporated into an existing dynamic, shell of revolution finite element computer code and the cases of an impulsively loaded circular ring and circular plate are examined. Conclusions regarding the areas of applicability of each hardening rule are then presented. (Author)