Abstract
An elastic-plastic analysis of notched plates subjected to tension force or bending moment was made. Based on this analysis, methods of evaluating approximately the stress and strain at the notch root were proposed. Dimensionless master curves were proposed for estimating the stress and strain concentration factors under small-scale yielding condition and the stress and strain at the notch root under large-scale yielding condition. This master-curve approach was found valid in all the cases analysed in this study. A simple formula was further developed by which the stress and strain at the notch root could approximately be calculated under load conditions below and above the gross yield stress by using the J-integral, together with a formula for estimating the J-integral. The estimated values of the notch stress and strain by this set of the approximation formulae agreed well with the results of numerical analysis.
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