ASME 1993 Nadai Lecture—Elastoplastic Stress and Strain Concentrations

摘要: Elastic stress concentration factors are familiar and easily incorporated into the design of components or structures through charts finite element analysis. However when material at most concentrated location no longer behaves elastically, computation local stresses strains is not so easy. Local elastoplastic behavior an especially important consideration loading cyclic. This paper summarizes predictive capability Neuber Glinka models that relate gross to strains. The author his students have used a unique laser-based technique capable measuring biaxial over very short gage lengths evaluate two models. Their results, as well those from earlier studies by other researchers using foil gages, lead general conclusion model works best region in state plane for strain. There intermediate levels constraint neither nor presents recommended practice predicting any constraint. First, one computes estimates initial elastic Then, based on amount constraint, selects appropriate compute