<s>
Fastran	B-Application
is	O
a	O
computer	O
program	O
for	O
calculating	O
the	O
rate	O
of	O
fatigue	O
crack	O
growth	O
by	O
combining	O
crack	O
growth	O
equations	O
and	O
a	O
simulation	O
of	O
the	O
plasticity	O
at	O
the	O
crack	O
tip	O
.	O
</s>
<s>
Fastran	B-Application
models	O
accelerations	O
and	O
retardation	O
and	O
other	O
variable	O
amplitude	O
loading	O
effects	O
in	O
crack	O
growth	O
using	O
a	O
crack	O
closure	O
model	O
.	O
</s>
<s>
Fastran	B-Application
was	O
written	O
in	O
the	O
1980s	O
by	O
James	O
C	O
.	O
Newman	O
while	O
at	O
NASA	O
and	O
is	O
an	O
acronym	O
derived	O
from	O
NASA	O
FATIGUE	O
CRACK	O
GROWTH	O
STRUCTURAL	O
ANALYSIS	O
.	O
</s>
<s>
FASTRAN	B-Application
is	O
written	O
in	O
the	O
Fortran	B-Application
programming	I-Application
language	I-Application
.	O
</s>
<s>
Fastran	B-Application
has	O
a	O
variety	O
of	O
crack	O
growth	O
equations	O
built	O
in	O
along	O
with	O
piece	O
wise	O
linear	O
equations	O
that	O
can	O
be	O
read	O
from	O
file	O
.	O
</s>
<s>
Plasticity	O
will	O
be	O
greater	O
in	O
regions	O
of	O
plane	O
stress	O
but	O
Fastran	B-Application
only	O
models	O
the	O
crack	O
as	O
a	O
2d	O
cross	O
section	O
.	O
</s>
<s>
Fastran	B-Application
has	O
been	O
used	O
in	O
the	O
research	O
community	O
and	O
for	O
maintaining	O
the	O
safe	O
life	O
of	O
aircraft	O
as	O
the	O
C-130	O
used	O
by	O
the	O
USAF	O
,	O
RAF	O
and	O
RAAF	O
.	O
</s>
