PRACTICAL STRESS EXPRESSIONS FOR STRESS CONCENTRATION REGIONS

Abstract

Abstract Approximate equations were developed to describe the stress fields in stress concentration regions. A uniaxial tension loading condition was considered. For infinite bodies, the stress equations contain two parameters, the stress concentration factor K t and the notch root radius ρ; for finite bodies, a finite size correction factor f w which involves the notch depth, t , and the length of ligament ahead of the notch tip, d , was introduced. After the approximate equations reach their minimum value, a uniform distribution is assumed. The accuracy of this description of the stress field was verified by comparison with analytical solutions and the results of numerical analysis. The new equations give better estimations of stress fields than currently available approximate expressions.