/EOS/PUFF

Block Format Keyword

/EOS/PUFF - Linear Polynomial Equation of State

Description

Describes the linear polynomial equation of state P(,E).

Format

Field	Contents	SI Unit Example
mat_ID	Material identifier (Integer, maximum 10 digits)
unit_ID	Optional unit identifier (Integer, maximum 10 digits)
eos_title	EOS title (Character, maximum 100 characters)
C1	C1 coefficient (Comment 1, Region 1) (Real)
C2	C2 coefficient (Real)
C3	C3 coefficient (Real)
0	Gruneisen gamma (Real)
T1	T1 coefficient (Comment 1, Region 2) Default= C1 (Real)
T2	T2 coefficient (Real)
Es	Sublimation energy per unit initial volume (Real)
H	H coefficient (Comment 1, Region 3) (Real)
E0	Initial energy per unit initial volume (Real)

#RADIOSS STARTER

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/UNIT/1

unit for mat

g cm mus

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#- 2. MATERIALS:

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/MAT/HYD_JCOOK/1/1

Copper

# RHO_O

8.9

# E NU

1.3 .34

# A B n EPS_max SIG_max

9E-4 .00292 .31 0 0

# Pmin

# C EPS_DOT_0 M Tmelt Tmax

.025 1E-6 1.09 1356 1E30

# RHOCP

3.432E-5

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

/EOS/PUFF/1/1

Copper

# C1 C2 C3 G0

1.3597 2.7466 2.4479 1.97

# T1 T2 ES

0 0 0.12282

# H E0

1 1.25675

#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|

#ENDDATA

1.	Let and E, the internal energy per unit initial volume, the pressure is defined by:

Region 1: > 0

with

Region 2: > 0 and E < Es

Region 3: < 0 and E > Es

with

2.	This EOS can be used with material law /MAT/LAW3, /MAT/LAW4 (Johnson-Cook) or /MAT/LAW49 (Steinberg).

"The PUFF 66 Computer Programs” Brodie, Hormuth, Air Force Weapon Laboratory, May 1966.