Computer Science
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007icar..189..595q&link_type=abstract
Icarus, Volume 189, Issue 2, p. 595-597.
Computer Science
2
Scientific paper
We show Lee, Pappalardo, and Makris' [2005. Icarus 177, 367 379] argument that surface cracks in Europa's icy shell penetrate 3 10 times deeper in the presence of subsurface ocean is not correct. We use numerical calculations to demonstrate that there is at most 50% increase in penetration depth for a crack opening in a shell of finite thickness compared to a half-space. We also propose a simple equation based on force balances to estimate the maximum thickness of an ice shell that can be opened under tensile stress. Our calculations show that a crack can only penetrate 330-m-thick ice shell under 200 kPa far-field tensile stress and half of that if the stress is 100 kPa. But the presence of water would allow crack penetrate ˜4.0 km into the ice shell with zero porosity.
Buck Roger W.
Germanovich Leonid
Qin Ran
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