An analytical model for fracture nucleation in collapsible stratifications | Zendy

Heierli J. | Zendy; Zaiser M. | Zendy

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An analytical model for fracture nucleation in collapsible stratifications

Author(s) -

Heierli J.,

Zaiser M.

Publication year - 2006

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2005gl025311

Subject(s) - nucleation , stratification (seeds) , surface energy , materials science , fracture (geology) , fracture mechanics , elastic energy , mechanics , geology , composite material , thermodynamics , physics , seed dormancy , germination , botany , dormancy , biology

In collapsible stratifications a particular type of fracture can develop for which nucleation and propagation are governed by the transformation of gravitational energy into fracture energy. The associated nucleation problem is studied for a stratification consisting of an elastic surface layer, a collapsible intermediate layer and a rigid basal layer. An analytical model for fracture nucleation is obtained by calculating the energy (‘crack energy’) associated with a localized collapse of the intermediate layer. The size and energy of a critical crack are evaluated as functions of continuum properties of the strata. The theory is illustrated by an application to the case of whumpfs in collapsible snow stratifications.

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