/EOS/POLYNOMIAL
Block Format Keyword Describes the linear polynomial equation of state .
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/EOS/POLYNOMIAL/mat_ID/unit_ID | |||||||||
eos_title | |||||||||
C0 | C1 | C2 | C3 | ||||||
C4 | C5 | E0 | Psh |
Definition
Field | Contents | SI Unit Example |
---|---|---|
mat_ID | Material identifier (Integer, maximum 10 digits) |
|
unit_ID | Unit Identifier (Integer, maximum 10 digits) |
|
eos_title | EOS
title (Character, maximum 100 characters) |
|
C0 | Hydrodynamic pressure law
coefficient (Real) |
|
C1 | Hydrodynamic pressure law
coefficient (Real) |
|
C2 | Hydrodynamic pressure law
coefficient (Real) |
|
C3 | Hydrodynamic pressure law
coefficient (Real) |
|
C4 | Energy pressure law
coefficient (Real) |
|
C5 | Energy pressure law
coefficient (Real) |
|
E0 | Initial internal energy per unit reference
volume (Real) |
|
Psh | Pressure shift (Real) |
|
Reference density Default = material density (Real) |
Example (Steel)
#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/LAW20/1
steel (unit: g_cm_mus)
# BLANK CARD
# mat_ID1 mat_ID2 IC1 IC2 Idiscrete
8 9 0 0 0
# Alpha1 Alpha2
0.82 0.18
/ALE/MAT/1
# Modif. factor.
0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/HYD_JCOOK/8
steel
# RHO_I RHO_O
7.8899999 0
# E nu
2.0999999 .30000001
# A B n epsmax sigmax
.011 .00275 .36000001 0 0
# Pmin
1E-10
# C EPS_DOT_0 M Tmelt Tmax
.022 1E-6 1 1811 2000
# RHOCP T_r
3.5699999E-5 0
/EOS/POLYNOMIAL/8
steel
# C0 C1 C2 C3
0 1.6900001 3.0999999 0
# C4 C5 E0 Psh RHO_0
1.83 1.83 0 0 0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/MAT/HYD_JCOOK/9
tungstene
# RHO_I RHO_O
17.6 0
# E nu
3.5999999 .30000001
# A B n epsmax sigmax
.01506 .00177 .12 0 0
# Pmin
1E-10
# C EPS_DOT_0 M Tmelt Tmax
.016000001 1E-6 1 3400 3400
# RHOCP T_r
2.36E-5 0
/EOS/POLYNOMIAL/9
tungstene
# C0 C1 C2 C3
0 2.8199999 2 -1.37
# C4 C5 E0 Psh RHO_0
1.54 1.54 0 0 0
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#ENDDATA
Comments
- Pressure is defined by the linear
polynomial:
(1) with(2) and being the internal energy per unit reference volume.
- If , then .
- Equations of state are used by
Radioss to compute the hydrodynamic pressure and are
compatible with the material laws:
- /MAT/LAW3 (HYDPLA)
- /MAT/LAW4 (HYD_JCOOK)
- /MAT/LAW6 (HYDRO or HYD_VISC)
- /MAT/LAW10 (DPRAG1)
- /MAT/LAW12 (3D_COMP)
- /MAT/LAW49 (STEINB)
- /MAT/LAW102 (DPRAG2)
- /MAT/LAW103 (HENSEL-SPITTEL)