Author(s)

S. Sorbo & G. Harkegard

Abstract

Evaluation of approximate methods for elastic-plastic analysis of notched bodies S. S0rb0, G. Harkegard The Norwegian Institute of Technology, Trondheim and ABB Power Generation, Baden, Switzerland ABSTRACT Predictions based on three different methods for estimating stress and strain at the root of a notch in an elastic-plastic body are compared with the results of finite element analysis for a uniaxially loaded double-edge notched plate under plane strain conditions. A generalisation of Neuber's rule based on equivalent stress and strain is shown to provide accurate results at nominal conditions ranging from linearly elastic to fully plastic. Estimates based on invariance of total strain energy density and strain energy density provide up- per and lower bounds, respectively, to the energy density at the notch root. INTRODUCTION Through the development of advanced computational techniques and fast computers, accurate simulation of the mechanical behaviour of real components

Keywords