Theor.Appl.Fract.Mech. 20, 67-74, 1994


MODE-I CRACK PROJECTION PROCEDURE USING
THE STRAIN ENERGY DENSITY CRITERION

F.D. Fischer¹ and F.G. Rammerstorfer²

¹Institute of Mechanics,
University of Mining and Metallurgy, Leoben, Austria
²Institute of Lightweight Structures and Aerospace Engineering,
TU Wien, Vienna, Austria


Abstract - A practice used in linear elastic fracture mechanics is the projection of a crack onta a plane normal to principal tensile stress axes for computing the stress intensity factor KI. The minimum strain-energy criterion is applied for different crack configurations with the introduction of a safety factor Si which is the ratio of the strian energy density factor of the projectec crack and that of the original crack. Numerous crack configurations are investigated to illustrate the degree of conservativeness of the crack projection procedure.


(hjb,960710)