Strenghth of thin plastic sheets for bulkheads in space colonies

Forum: SSI-List
Thread: Strenghth of thin plastic sheets for bulkheads in space colonies

# 21605 byNiclas Jacobsz on April 18, 2007, 10:19 a.m.
Member since 2022-08-22

Correction, it is 100.000 Newton, not 10.000
I had 10.000 kg in mind (10 metric tons), but that is mass, not force.
Read the basics section in my book for more on that:
http://www.draaisma.net/space-tourism/moon_base_landing.php

Niclas

>
> Though I'm a crank according to Joe, unlike him, I at least know
that
> 1 bar pressure difference yields a force of 10 metric tons per
square
> meter (the weight on Earth of around 10 cars piled upon each
other) -
> it's in my book "full of nonsense", if you would bother to read it.
>
> This it does for water just the same as for air or for any
substance.
> Pressure is pressure (100 kPa), area is area (1 sqm) and force is
the
> range of the two (10.000 Newton, OK 9800 N)
>
> Just go ahead with your flat plastic sheets of a few mils thick to
> hold against vacuum, so people have something to laugh about!
>
> Niclas
>
> --- In ssi_list@... "Jolly Roger"
> >
> > > > ... for a colony
> > > > larger than one
> > > > kilometer thickness we need curvature on the
> > > > pressure bulkheads.> >
> > >
> > > Roger, a torus is already a curved hull - no flat
> > > surfaces anywhere.
> > >
> > Ed,
> >
> > The pressure bulkheads separate the internal volume of the torus
> into
> > smaller sections so that if the outer hull is punctured only a
> small
> > part is depressurized, not the whole volume. The shape of a
> bulkhead
> > is a flat circle.
> >
> > Thanks, Joe, for pointing out that the bulkheads need not be very
> > massive. Transparent plastic sheeting a few mils thick
(visquene)
> > will do just fine.
> >
> > My naval experience taught me that compartmentation and double-
hull
> > construction are good safety factors to incorporate into a space
> > colony. I just forgot that water is a much denser fluid than
air,