Fatigue & Fracture of Engineering Materials & Structures · 1996 · 16 citations · 9 references
Natural SciencesMaterials EngineeringMaterials ScienceComputational Materials ScienceMechanical Behavior Of MaterialsStructural MaterialsConstitutive ModelingPlastic DeformationPlasticityStrain HardeningStrength Of MaterialsStress-strain BehaviorConjugationCyclic LoadingCyclic Loading BehaviorCyclic PlasticityCyclic StrainFatigue BehaviorFatigue Under Cyclic LoadingStress
Abstract— A version of the endochronic theory of plasticity for the modelling of nonproportional cyclic loading has been developed. To describe an additional hardening of a material a new engineering method for defining a nonproportionality parameter is proposed for a wide class of cyclic strain paths with a prescribed maximum range of plastic or total strains. This parameter makes it possible to establish an unambiguous linear dependence between the cyclic strain path shape and the stress level in a stabilized state. Conjugation conditions have been formulated to describe complex histories of nonproportional cyclic loading. The results of the modelling are shown to be in fair agreement with the experimental data.
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