Microbranching instability and the dynamic fracture of brittle materials.

@article{Sharon1996MicrobranchingIA,
  title={Microbranching instability and the dynamic fracture of brittle materials.},
  author={Sharon and Fineberg},
  journal={Physical review. B, Condensed matter},
  year={1996},
  volume={54 10},
  pages={
          7128-7139
        }
}
We describe experiments on the dynamic fracture of the brittle plastic, PMMA. The results suggest a view of the fracture process that is based on the existence and subsequent evolution of an instability, which causes a single crack to become unstable to frustrated microscopic branching events. We demonstrate that a number of long-standing questions in the dynamic fracture of amorphous, brittle materials may be understood in this picture. Among these are the transition to crack branching… CONTINUE READING

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23 The PMMA used has the following static properties: Poisson ratio ϭ0.35; V R ϭ926 m/s. 24 B. Epstein

  • 471 ͑1947͒. 25 A. N. Kolmogoroff, C. R. ͑Dokl.͒ Acad. Sci. URSS 31͑2͒

23 The PMMA used has the following static properties: Poisson ratio ϭ0.35; V R ϭ926 m/s. 24 B. Epstein

  • 471 ͑1947͒. 25 A. N. Kolmogoroff, C. R. ͑Dokl.͒ Acad. Sci. URSS 31͑2͒

26 Similar arguments for fluctuations of the crack's velocity can be found in

  • J. Mech. Phys. Solids J. D. Eshelby ibid