PRACTICAL STRESS EXPRESSIONS FOR STRESS-CONCENTRATION REGIONS

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 par ameters, the stress concentration factor K-t and the notch root radius rho; for finite bodies, a finite size correction factor f(W) which in volves the notch depth, t, and the length of ligament ahead of the not ch tip, d, was introduced. After the approximate equations reach their minimum value, a uniform distribution is assumed. The accuracy of thi s description of the stress held was verified by comparison with analy tical solutions and the results of numerical analysis. The new equatio ns give better estimations of stress fields than currently available a pproximate expressions.