Phys. Rev. Lett. 71, 3162–3165 (1993)Acoustic emissions from rapidly moving cracksReceived 2 August 1993; published in the issue dated 8 November 1993 Linear elasticity is unable to predict completely the dynamics of a rapidly moving crack without the addition of a phenomenological fracture energy. Our measurements of acoustic emission, crack velocity, and surface structure demonstrate quantitatively similar dynamical fracture behavior in two very different materials, polymethylmethacrylate and soda-lime glass. This unexpected agreement suggests that there exist universal features of the fracture energy that result from dissipation of energy in a dynamical instability. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.71.3162
DOI:
10.1103/PhysRevLett.71.3162
PACS:
68.35.Gy, 62.20.Mk, 83.50.Tq
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