The path stability problem for fracture scaring from a straight crack in a biaxially stressed plate is investigated. The analysis is performed by employing a simple equivalent crack in order to obtain an approximate evaluation of the Stress Intensity Factors of the S-shaped crack which may be generated by the fracture propagation. It is shown that crack propagation derivates from the original direction when the applied stress parallel to the crack plane becomes higher than that perpendicular to it. The trend of the fracture trajectories and their sensitivity to small derivations caused by irregularities have also been determined for various values of the stress biaxialty ratio. Some comparisons with previous analyses are made.
Some observations on the path stability in fracture propagation for biaxially stressed plates
GAMBAROTTA, LUIGI
1980-01-01
Abstract
The path stability problem for fracture scaring from a straight crack in a biaxially stressed plate is investigated. The analysis is performed by employing a simple equivalent crack in order to obtain an approximate evaluation of the Stress Intensity Factors of the S-shaped crack which may be generated by the fracture propagation. It is shown that crack propagation derivates from the original direction when the applied stress parallel to the crack plane becomes higher than that perpendicular to it. The trend of the fracture trajectories and their sensitivity to small derivations caused by irregularities have also been determined for various values of the stress biaxialty ratio. Some comparisons with previous analyses are made.
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