Crack Growth by Surface Diffusion in Viscoelastic Media
Abstract
We discuss steady state crack growth in the spirit of a free boundary problem. It turns out that mode I and mode III situations are very different from each other: In particular, mode III exhibits a pronounced transition towards unstable crack growth at higher driving forces, and the behavior close to the Griffith point is determined entirely through crack surface dissipation, whereas in mode I the fracture energy is renormalized due to a remaining finite viscous dissipation. Intermediate mixed-mode scenarios allow steady state crack growth with higher velocities than for pure mode I.
- Publication:
-
Physical Review Letters
- Pub Date:
- November 2008
- DOI:
- 10.1103/PhysRevLett.101.205501
- arXiv:
- arXiv:0803.0948
- Bibcode:
- 2008PhRvL.101t5501S
- Keywords:
-
- 62.20.mt;
- 46.15.-x;
- 46.50.+a;
- 47.54.-r;
- Cracks;
- Computational methods in continuum mechanics;
- Fracture mechanics fatigue and cracks;
- Pattern selection;
- pattern formation;
- Condensed Matter - Materials Science
- E-Print:
- doi:10.1103/PhysRevLett.101.205501