Noon-linear physsicochemical processes
p
undder severe enerrgetic impact::
breakdoown, facture, explosion,
e
etc..
Submission 275
2
INFLUEN
NCE OF TH
HE ENERG
GY FLUEN
NCE AND THE ALUM
MINUM L
LAYER TH
HICKNESS
S
ON THE
E IGNITIO
ON DELAY
Y TIME OF
F EXPLOS
SIVE MAT
TERIALS
BY A LASER PULSE
A
ALEXANDE
ER KHANEF
FT1, 2 AND VADIM DO
OLGACHEV
V1
1
2
Kemerovo State
S
Univeersity, Russiia
National Research Tom
msk Polytecchnic Univeersity, Russiia
avkhhaneft@ma
ail.ru
System
m of three equations of thermal conductivitty for threee-layer systtem: glas – aluminum
m
layer – expplosive matterial have been
b
numerrically solved. Metal layer, absorbbing the en
nergy of thee
laser pulsee, heats up thhe glas andd the explosiive materiall. The meltiing of the alluminum laayer and thee
explosive material was
w taken into accouunt. PETN,, HMX, RDX,
R
and TATB werre selectedd
as explosivve materialss. The thickkness of thee aluminum
m layer was varied betw
ween 100 an
nd 500 nm..
It was dettermined thhat the thickker the meetal layer iss the longeer the ignitiion time deelay of thee
explosive materials
m
byy laser pulsse. It is caussed by fact that the thicckness of thhe skin layeer, in whichh
the electromagnetic wave
w
is absoorbed at thee constant energy
e
fluennce, significcantly smalller than thee
thickness of
o the alum
minum layer. In this casse, more tim
me is needeed for the heating of th
he cold partt
of the layeer with an inncrease of its
i thicknesss. Calculations shown that the larger the energy fluencee
of the laserr pulse the shorter the ignition tim
me delay off the explosiive materialls at fixed thickness
t
off
the aluminnum layer.
Keywoords: alumiinum layer, explosive material,
m
lasser pulse.
427