Crack growth by surface diffusion in viscoelastic media
Materials Science
2009-11-13 v1
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, leading to the conjecture that mode I cracks can be unstable with respect to a rotation of the crack front line.
Cite
@article{arxiv.0803.0948,
title = {Crack growth by surface diffusion in viscoelastic media},
author = {R. Spatschek and E. A. Brener and D. Pilipenko},
journal= {arXiv preprint arXiv:0803.0948},
year = {2009}
}