Abstract
AbstractIn the present paper, a possibility of determination of initial points of crack propagation in front of the crack tip is investigated. This possibility consists in the fact that apart from the first term of the series solution for the elastic field variables in crack tip vicinity further terms are considered in the formulation of characteristic quantities for crack judgment. Above all an extended Sih‐Criterion is presented. A qualitatively new information results in the determination of hypothetical initial points of crack propagation in front of the crack tip. We obtain similar results if we consider the extended stressparameter‐criterion and the extended multi‐axial‐value‐criterion.
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