Bifurcation of a Running Crack in Antiplane Strain,
NORTHWESTERN UNIV EVANSTON ILL STRUCTURAL MECHANICS LAB
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An elastodynamic explanation of running crack bifurcation is explored. The geometry is a semi-infinite body in a state of anti-plane strain, which contains a two-dimensional edge crack. It is assumed that a quasi-static increase of the external loads gives rise to rapid crack propagation at time t 0, with an arbitrary and time-varying speed, but in the plane of the crack. The elastodynamic intensity factors are computed, and the balance of rates of energies is employed to discuss the conditions for bifurcation.
- Solid State Physics