*HEADING
--------------------------
DERA BENCHMARK 6
SPHERICAL ELASTIC SHELL
PLANAR STEP SHOCKWAVE
HUANG
2-D AXISYMMETRIC
SHOCKWAVE: PMAX=1 MPA
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=PLANE-STEP
0.,0.,1.E-6,1.,1.,1.
**
*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=PLANE-STEP
ASSEMBLY.SHELL-OUTER,1.E6
*INCIDENT WAVE,PROPERTY=WAVE,PRESSURE AMPLITUDE=PLANE-STEP
ASSEMBLY.FLUID-INNER,1.E6
*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