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Study of meteoroid impacts to be conducted here
| Study of meteoroid impacts in
relation to different structural
materials will be conducted here
under a $20,000 National Aero
nautics and Space Administra
tion grant.
Conducting the NASA research
will be Dr. James L. Rand, as
sistant professor in the Aero
space Engineering Department.
The grant is effective Sept. 1 for
one year.
Rand said the research will be
in two phases.
Employing prediction tech
niques used in the Apollo pro
gram, the engineer and two grad
uate students to be named will re
late dynamic material properties
to meteoroid impact.
In the second phase, hyper
velocity impact data accumulated
by NASA will be reduced. They
will work with “target” craters
produced in the laboratory by
impacting materials with parti
cles — or man-made “meteor
oids” — of known size and veloc
ity.
“With knowledge of the crater
ing damage caused by these par
ticles, we will try to predict the
damage caused by a natural
meteoroid of any size traveling
at any velocity,” Rand explained.
Consisting of undefined matter
that orbits in the solar system,
Meteoroids range in size from
dust-like particles to bits the size
of a grain of sand and larger.
They can become visible to the
human eye when the meteoroid
collides with the earth’s atmos
phere, at which point they be
come meteors.
Meteors are visible as flashes
of light through the incandescent
heating of their plunge — aver
aging 25 miles per second — into
the atmosphere. Fragments that
survive the fiery passage and
reach the earth are called meteor
ites.
Rand noted that statistical
analysis has shown “that there
is little chance of irreparable
damage” to spacecraft struck by
meteoroids.
The Apollo 12 lunar landing
mission of 1969 was carried out
during the November Leonid
meteor shower, one of the heavier
annual showers. Five previous
Apollo flights — 7 through 11 —
coincided with less active meteor
showers.
Rand is a University of Mary
land graduate, six-year research
engineer with the U. S. Naval
Ordnance Laboratory and re
cipient of the General Dynamics
“Excellence in Engineering
Teaching” award at Texas A&M
last spring.
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