Author(s): J. Weiss; E. M. Schulson
Linked Author(s):
Keywords: No Keywords
Abstract: Using a special geometry of columnar ice samples, we studied the process of grain boundary sliding (GBS) in ice, and its role on crack nucleation. It is shown that GBS is a viscous process leading to the formation of fuzzy, discontinuous features called decohesions along the boundary plane. Cracks nucleate from these decohesions, pointing out the role of GBS on crack nucleation in ice. However, the usual way to modelize this crack nucleation mechanism, ignoring the kinematics of sliding, appears inadequate. GBS and the formation of decohesions are enhanced at higher temperature, owing to the viscous character of GBS.
Year: 1998