*HEADING
--------------------------
DERA BENCHMARK 7
SPHERICAL ELASTIC SHELL
PLANAR EXPONENTIALLY DECAYING SHOCKWAVE
HUANG
2-D AXISYMMETRIC
SHOCKWAVE: PMAX=1 MPA
DECAY TIME: 6.845E-4
SPHERE READIUS: 1M
SHELL THINCKNESS: 0.02M
MATERIAL: STEEL
RHO=7766 KG/M^3
E=210 GPA
NU=0.3
FLUID: WATER
RHO=997 KG/M^3
C=1461 M/S
--------------------------
** SECTION 1 OF THE INPUT FILE CREATED BY ABAQUS/CAE
**
** PARTS
**
*PART, NAME=FLUID
*END PART
*PART, NAME=SHELL
*END PART
**
** ASSEMBLY
**
*ASSEMBLY, NAME=ASSEMBLY
**
*INSTANCE, NAME=FLUID-1, PART=FLUID
*NODE
*ELEMENT, TYPE=ACAX4R
** REGION: (WATER:PICKED)
*ELSET, ELSET=_I1, INTERNAL, GENERATE
** SECTION: WATER
*SOLID SECTION, ELSET=_I1, MATERIAL=WATER
1.,
*END INSTANCE
**
*INSTANCE, NAME=SHELL-1, PART=SHELL
*NODE
*ELEMENT, TYPE=SAX1
** REGION: (SHELL:PICKED)
*ELSET, ELSET=_I1, INTERNAL, GENERATE
** SECTION: SHELL
*SHELL SECTION, ELSET=_I1, MATERIAL=STEEL
0.02, 5
*END INSTANCE
*NSET, NSET=FLUID, INSTANCE=FLUID-1, GENERATE
*ELSET, ELSET=FLUID, INSTANCE=FLUID-1, GENERATE
*NSET, NSET=FLUID-INNER, INSTANCE=FLUID-1
*ELSET, ELSET=FLUID-INNER, INSTANCE=FLUID-1
*NSET, NSET=FLUID-OUTER, INSTANCE=FLUID-1
*ELSET, ELSET=FLUID-OUTER, INSTANCE=FLUID-1
*NSET, NSET=SHELL, INSTANCE=SHELL-1, GENERATE
*ELSET, ELSET=SHELL, INSTANCE=SHELL-1, GENERATE
*NSET, NSET=LEADINGNODE, INSTANCE=SHELL-1
*NSET, NSET=TRAILINGNODE, INSTANCE=SHELL-1
*NSET, NSET=MIDNODE, INSTANCE=SHELL-1
*ELSET, ELSET=_FLUID-INNER_S4, INTERNAL, INSTANCE=FLUID-1, GENERATE
*ELSET, ELSET=_FLUID-INNER_S2, INTERNAL, INSTANCE=FLUID-1, GENERATE
*SURFACE, TYPE=ELEMENT, NAME=FLUID-INNER
_FLUID-INNER_S4, S4
_FLUID-INNER_S2, S2
*ELSET, ELSET=_FLUID-OUTER_S4, INTERNAL, INSTANCE=FLUID-1, GENERATE
*ELSET, ELSET=_FLUID-OUTER_S2, INTERNAL, INSTANCE=FLUID-1, GENERATE
*SURFACE, TYPE=ELEMENT, NAME=FLUID-OUTER
_FLUID-OUTER_S4, S4
_FLUID-OUTER_S2, S2
*ELSET, ELSET=_SHELL-OUTER_SPOS, INTERNAL, INSTANCE=SHELL-1, GENERATE
*SURFACE, TYPE=ELEMENT, NAME=SHELL-OUTER
_SHELL-OUTER_SPOS, SPOS
** CONSTRAINT: CONSTRAINT-1
*TIE, NAME=CONSTRAINT-1, ADJUST=YES
FLUID-INNER, SHELL-OUTER
*END ASSEMBLY
**
** MATERIALS
**
*MATERIAL, NAME=STEEL
*DENSITY
 7766.,
*ELASTIC
 2.1E+11, 0.3
*MATERIAL, NAME=WATER
*ACOUSTIC MEDIUM
*DENSITY
 997.,
** ----------------------------------------------------------------
** SECTION 2 OF THE INPUT FILE CREATED MANUALLY
**
*AMPLITUDE, NAME=PULSE, TIME=TOTAL TIME
.00000D+00,.00000D+00,.42781D-06,.16014D+03,.85562D-06,.64035D+03,.12834D-05,.14403D+04
.17112D-05,.25598D+04,.21391D-05,.39985D+04,.25669D-05,.57560D+04,.29947D-05,.78321D+04
.34225D-05,.10226D+05,.38503D-05,.12939D+05,.42781D-05,.15969D+05,.47059D-05,.19316D+05
.51337D-05,.22981D+05,.55616D-05,.26962D+05,.59894D-05,.31260D+05,.64172D-05,.35874D+05
.68450D-05,.40804D+05,.72728D-05,.46049D+05,.77006D-05,.51610D+05,.81284D-05,.57486D+05
.85562D-05,.63677D+05,.89841D-05,.70182D+05,.94119D-05,.77001D+05,.98397D-05,.84134D+05
.10267D-04,.91580D+05,.10695D-04,.99340D+05,.11123D-04,.10741D+06,.11551D-04,.11580D+06
.11979D-04,.12450D+06,.12407D-04,.13351D+06,.12834D-04,.14283D+06,.13262D-04,.15246D+06
**
*INCIDENT WAVE PROPERTY,NAME=WAVE,TYPE=PLANE
*INCIDENT WAVE FLUID PROPERTY
*IMPEDANCE PROPERTY,TYPE=SPHERE,NAME=OUTER
**
**
*STEP, NAME=LOADING
SHOCKWAVE LOADING
*DYNAMIC, EXPLICIT, DIRECT USER CONTROL
1E-07, 0.02738
*INCIDENT WAVE,PROPERTY=WAVE,PRESSURE AMPLITUDE=PULSE
ASSEMBLY.SHELL-OUTER,1.0
*INCIDENT WAVE,PROPERTY=WAVE,PRESSURE AMPLITUDE=PULSE
ASSEMBLY.FLUID-INNER,1.0
*SIMPEDANCE
FLUID-OUTER,OUTER
*BULK VISCOSITY
**
*OUTPUT, FIELD
*NODE OUTPUT
U,POR
*ELEMENT OUTPUT
S,E
*OUTPUT, HISTORY, TIME INTERVAL=1.E-5
*NODE OUTPUT,NSET=ASSEMBLY.LEADINGNODE
U,V,A
*NODE OUTPUT,NSET=ASSEMBLY.TRAILINGNODE
U,V,A
*NODE OUTPUT,NSET=ASSEMBLY.MIDNODE
U,V,A
*END STEP