Author(s): John Dempsey
Linked Author(s):
Keywords: River Ice; Sea Ice; Lake Ice; Ice-Structure Interaction
Abstract: More than two decades ago, the formation of high-pressure zones during compressive ice failure was explored (Dempsey et al., 2001). In the latter paper, localized high-pressure zones were modeled by studying a hollow radially cracked sphere. The spherical indentation of an ice wall is a closely related topic and has been studied experimentally. The field tests at Hobson’s Choice Ice Island in 1989 (Frederking et al., 1990) featured a spherical indenter. Historically, the use of a spherically tipped indenter while probing for different material properties has enjoyed a rejuvenation, partly because it is less sensitive to the alignment between the indenter and the material surface. In this paper, an expression is obtained for the load induced by a constant rate of indentation of a spherical indenter. At the onset of deformation the behavior will not involve creep, but may well include recrystallization and damage. Viscoelasticity will be more influential for slower indentation rates.
Year: 2022