Generic features of brittle crack propagation engendered by the dynamics of the process zone
1 IEE S.A. ZAE Weiergewan - 11, rue Edmond Reuter, L-5326 Contern, Luxembourg
2 Institute for Problems of Mechanical Engineering, RAS - Bol'shoi prosp. V. O. 61, 199178 St. Petersburg, Russia
Received: 18 July 2015
Accepted: 5 October 2015
We demonstrate that internal dynamics within the transformational process zone at the tip of a propagating crack gives rise to energy dissipation. It manifests itself as a velocity-dependent resistance force exerted on the crack tip. It has the effect of limiting the terminal crack speed to below the Rayleigh velocity as well as giving rise to a discontinuous dependence of the crack velocity upon the driving force.
PACS: 62.20.mt – Cracks / 64.60.av – Cracks, sandpiles, avalanches, and earthquakes
© EPLA, 2015