Oscillations in rapid fracture.

  title={Oscillations in rapid fracture.},
  author={A. Livne and Oded Ben-David and Jay Fineberg},
  journal={Physical review letters},
  volume={98 12},
Experiments of pure tensile fracture in thin brittle gels reveal a new dynamic oscillatory instability whose onset occurs at a critical velocity, VC=0.87CS, where CS is the shear wave speed. Until VC, crack dynamics are well described by linear elastic fracture mechanics (LEFM). These extreme speeds are obtained by suppression of the microbranching instability, which occurs when sample thicknesses are made comparable to the minimum microbranch width. The wavelength of these sinusoidal… CONTINUE READING