Re: Ice properties under extreme cold and pressure

Thamk you for your reply

I was looked at
http://www.google.com/search?client=opera&rls=en&q=Pykrete&sourceid=opera&ie=utf-8&oe=utf-8

Wood chips too brittle and not matching ice at very low temperatures to be
a good reinforcing material ?

Looks like distilled water only if ice to be used as a structural member.


=========================


rekuci@xxxxxxxxx wrote:

zippo wrote:
I am trying to figure out maximum height a given diameter base
can support, cooled to liquid nitrogen temperature.

Cannot find stress-strain rate and other related data for ice at very
low temperatures
and high pressures, into the Terra Pascal range.

Terapascals? That high? 1 TPa = 9.87E6 atmospheres. The pressure at
the center of the earth is 14E6 atmospheres. Do you really expect to
find experimentally measured stress/strain curves at these pressures?
Besides that, ice will surely mechanically fail far before that,
regardless of temperature.

http://www.dartmouth.edu/~ianbaker/Ice/mechan.html (high purity ice
crystal, 20C, gone by 50 MPa with 1-2% strain)

I think you have to worry more about what form the ice is in, and the
magnitude and type of impurities and defects. These will have a much
larger effect on stress/strain than temperature, but you can be sure
that if this is ice in any natural environment, it'll have plenty of
defects and impurities and will fail much before 50 MPa.

The links you pasted make no sense relative to your question. The
parabola is a velocity profile of a flowing glacier and has nothing to
do with mechanical strength of ice.

.

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