4.2.1.2. Classification of field output written in odb files

In this section, the various types of field output results that can be written in an output data base (odb) file and that can be postprocessed by Odb2Matlab are classified in various categories, depending on the way in which the extraction of the results is handled by Odb2Matlab. The category is defined based on the number and type of outputs which are associated with the specific field output variable identifier. Different Python script is generated automatically by Odb2Matlab for each category. Four possibilities exist for a field output variable identifier written in an odb file:

▪The result belongs to category 1. The output of category 1 corresponds to scalar values. Only a single numerical value is contained.

▪The result belongs to category 2. The output of category 2 corresponds to vector values. 4 numerical values are contained which are the 3 vector components and the vector magnitude (MAGNITUDE).

▪The result belongs to category 3. The output of category 3 corresponds to tensor values. 16 numerical values are contained which are the 6 tensor components and the following 10 tensor invariants: INV3, MAXINPLANEPRINCIPAL, MAXPRINCIPAL, MIDPRINCIPAL, MININPLANEPRINCIPAL, MINPRINCIPAL, MISES, OUTOFPLANEPRINCIPAL, PRESS, TRESCA.

▪The result belongs to one of the above categories but it cannot be postprocessed by Odb2Matlab.

In the following table, each column contains:

▪First column: Description of the output quantity

▪Second column: Field output variable identifier as specified in the input file

▪Third column: Field output variable identifier as specified in the Python script used for the extraction of the corresponding result from the odb file

▪Fourth column: Category of the field output variable as above.

DESCRIPTION |
OUTPUT ID IN INPUT FILE |
OUTPUT ID IN ODB FILE |
CATEGORY |

Coordinates |
COORD |
COORD |
2 |

Nodal Flux Caused by Heat |
NFLUX |
NFL11 |
1 |

Stress |
S |
S |
3 |

Stress Invariant |
SINV |
S |
3 |

Section Force and Moment |
SF |
SF |
3 |

Energy Density |
ENER |
CENER |
1 |

DMENER |
1 |
||

EENER |
1 |
||

JENER |
1 |
||

PENER |
1 |
||

SENER |
1 |
||

VENER |
1 |
||

Energy (Summed over Element) |
ELEN |
ELASE |
1 |

ELCD |
1 |
||

ELCTE |
1 |
||

ELDMD |
1 |
||

ELJD |
1 |
||

ELKE |
1 |
||

ELPD |
1 |
||

ELSD |
1 |
||

ELSE |
1 |
||

ELVD |
1 |
||

Total Strain |
E |
E |
3 |

Plastic Strain |
PE |
AC YIELD |
1 |

PE |
3 |
||

PEEQ |
1 |
||

Creep Strain (Including Swelling) |
CE |
CE |
3 |

Total Inelastic Strain |
IE |
IE |
3 |

Total Elastic Strain |
EE |
EE |
3 |

Section Thickness |
STH |
STH |
1 |

Heat Flux Vector |
HFL |
HFL |
2 |

Section Strain and Curvature |
SE |
SE |
3 |

Saturation (Pore Pressure Analysis) |
SAT |
SAT |
1 |

Mass Concentration (Mass Diffusion Analysis) |
CONC |
CONC |
1 |

Gel (Pore Pressure Analysis) |
GELVR |
GELVR |
1 |

Total Fluid Volume Ratio |
FLUVR |
FLUVR |
1 |

Equivalent plastic strain components |
PEQC |
AC YIELD1 |
1 |

AC YIELD2 |
1 |
||

AC YIELD3 |
1 |
||

AC YIELD4 |
1 |
||

PEQC1 |
1 |
||

PEQC2 |
1 |
||

PEQC3 |
1 |
||

PEQC4 |
1 |
||

Pore Fluid Effective Velocity Vector |
FLVEL |
FLVEL |
2 |

Displacement |
U |
U |
2 |

Velocity |
V |
V |
2 |

Acceleration |
A |
A |
2 |

Reaction Force |
RF |
RF |
2 |

Electrical Potential |
EPOT |
EPOT |
1 |

Point Load |
CF |
CF |
2 |

Coordinates |
COORD |
COORD |
2 |

Pore or Acoustic Pressure |
POR |
POR |
1 |

Reactive Fluid Volume Flux |
RVF |
RVF |
1 |

Reactive Fluid Total Volume |
RVT |
RVT |
1 |

Electrical Reaction Charge |
RCHG |
RCHG |
1 |

Concentrated Electrical Nodal Charge |
CECHG |
CECHG |
1 |

Electrical Reaction Current |
RECUR |
RECUR |
1 |

Concentrated Electrical Nodal Current |
CECUR |
CECUR |
1 |

Viscous Forces Due to Static Stabilization |
VF |
VF |
2 |

Total Force |
TF |
AC YIELD |
1 |

CF |
2 |
||

LE |
3 |
||

PE |
3 |
||

PEEQ |
1 |
||

PEMAG |
1 |
||

RF |
2 |
||

S |
3 |
||

U |
2 |
||

Principal strains |
EP |
E |
3 |

Principal nominal strains |
NEP |
E |
3 |

Principal logarithmic strains |
LEP |
E |
3 |

Principal mechanical strain rates |
ERP |
ER |
3 |

Principal values of deformation gradient |
DGP |
AC YIELD |
1 |

CF |
2 |
||

LE |
3 |
||

PE |
3 |
||

PEEQ |
1 |
||

PEMAG |
1 |
||

RF |
2 |
||

S |
3 |
||

U |
2 |
||

Principal elastic strains |
EEP |
EE |
3 |

Principal inelastic strains |
IEP |
IE |
3 |

Principal thermal strains |
THEP |
THE |
3 |

Principal plastic strains |
PEP |
PE |
3 |

_________________________________________________________________________

Abaqus2Matlab - www.abaqus2matlab.com

Copyright (c) 2017 by George Papazafeiropoulos

If using this application for research or industrial purposes, please cite:

G. Papazafeiropoulos, M. Muniz-Calvente, E. Martinez-Paneda.

Abaqus2Matlab: a suitable tool for finite element post-processing.

Advances in Engineering Software. Vol 105. March 2017. Pages 9-16. (2017)

DOI:10.1016/j.advengsoft.2017.01.006

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