[Homeroast] Poisson's ratio WAS: Re: Compak vs Macap vs Rocky Grinders

Yakster yakster at gmail.com
Wed May 19 14:37:42 CDT 2010


Fish heads, fish heads, rolly polly fish heads,
Fish heads, fish heads, eat them up, yum!

-Chris
(sorry, couldn't help myself, I was demented at an early age)

On Wed, May 19, 2010 at 12:08 PM, Doug Hoople <doughoople at gmail.com> wrote:

> One word: bouillabaisse. :)
>
> Doug
> On Tue, May 18, 2010 at 9:30 AM, Tom & Maria - Sweet Maria's Coffee <
> sweetmarias at sweetmarias.com> wrote:
>
> > Doesn't this mean "Fish's Law"?
> >
> > Are we gonna take our queues from fish now? French fish at that?
> >
> > ;-0
> >
> >
> > Engineering is all voodoo anyway ;)
> >>
> >> --
> >> Ryan M. Ward
> >>
> >> *Note: This email was sent from a computer running Ubuntu Linux 9.10
> >> (Karmic Koala)
> >> http://www.ubuntu.com
> >>
> >> **Note: This signature was placed here by me and is not
> >> automatically-generated-annoying-end-of-email-spam placed here by anyone
> >> other than myself. I am a Linux nut and am doing my part to support open
> >> source software and the Linux and Ubuntu communities by getting the word
> out
> >> with each email I send, I encourage you to do the same.
> >>
> >>
> >>
> >>
> >>  Date: Tue, 18 May 2010 07:59:46 -0700
> >>>  From: theotherjo at gmail.com
> >>>  To: homeroast at lists.sweetmariascoffee.com
> >>>  Subject: Re: [Homeroast] Poisson's ratio WAS: Re: Compak vs Macap vs
> >>> Rocky     Grinders
> >>>
> >>>  Mike,
> >>>  Nice to hear a human description of a "Natural" force of nature.  We
> >>> being
> >>>  part of nature. Although some would argue I'm not at all natural of
> this
> >>>  earth like my mother who used to ( tongue in cheek I'm sure ) tell
> >>> friends
> >>>  when introducing me as a child that "Joe did not come by stork, there
> >>> was
> >>>  this small shiny ship that landed one night in our neighborhood."
> Could
> >>> this
> >>>  be why I love Sci fi and this black gold that runs through this list's
> >>>  vein's? I did a wiki pedia and some other reading so I would have a
> clue
> >>>  when you and RayO or anyone else shares information on this 'spro
> >>> tamping
> >>>  topic.
> >>>  Very interesting and fun now back to my coffee.
> >>>  JoeR
> >>>
> >>>  On Tue, May 18, 2010 at 7:34 AM, Mike Koenig <koenig.mike at gmail.com>
> >>> wrote:
> >>>
> >>>  > I'm probably splitting hairs here, but Poisson's effect happens on
> the
> >>>  > molecular level, with bonds elongating under pressure or strain. I'm
> >>> not a
> >>>  > geoscience guy, but I imagine the effect effect would happen in
> rocks,
> >>>  > dense
> >>>  > clays and shale, etc,  but what you are seeing in a coffee puck is
> >>>  > interactions between discrete non-uniform particles.
> >>>  >
> >>>  > I'm not arguing at all that you don't get some lateral expansion
> >>> during
> >>>  > tamping, since that certainly does happen, but it's not necessarily
> >>>  > uniform,
> >>>  > and dependent on the distribution (and re-arrangement under force)
> of
> >>> the
> >>>  > particles, as opposed to poisson's effect, which describes a
> >>> predictable
> >>>  > amount of lateral expansion based on the change axial length.  If
> the
> >>>  > expansion was due to poisson's effect, the puck would spring back
> when
> >>> you
> >>>  > let go of the tamper.   What you are getting is some re-arrangement
> of
> >>> the
> >>>  > particles under force (like when you step in sand, and it moves out
> of
> >>> the
> >>>  > way under your foot).
> >>>  >
> >>>  > --mike
> >>>  >
> >>>  >
> >>>  >
> >>>  > On Tue, May 18, 2010 at 3:01 AM, <raymanowen at gmail.com> wrote:
> >>>  >
> >>>  > > Then I don't know why the grounds would press out and seal against
> >>> the
> >>>  > > sides
> >>>  > > of the basket when you are only applying axial force with the
> >>> tamper.
> >>>  > > Hydrostatic?
> >>>  > >
> >>>  > > I hope I don't owe a refund of all our pay at the Geophysics
> >>> Research
> >>>  > > Institute at CSM. Please don't tell Dr. Levent Ozdemir or Dr. Russ
> >>> Miller
> >>>  > > we
> >>>  > > were doing bad oil shale research. Damn!
> >>>  > >
> >>>  > > What supports you when you walk on a sandy beach?
> >>>  > >
> >>>  > > Teach me, please. -ro
> >>>  > > _______________________________________________
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> >>>  --
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> >
> > --
> > -Tom
> >
> >
> >
> ____________________________________________________________________________
> > "Great coffee comes from little roasters" - Sweet Maria's Home Coffee
> > Roasting
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