Optional parameters – ABAQUS Volume II: I–Z User Manual

Page 289

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*POROUS ELASTIC

16.18

*POROUS ELASTIC:

Specify elastic material properties for porous materials.

This option is used to define the elastic parameters for porous materials.

Product:

ABAQUS/Standard

Type:

Model data

Level:

Model

Reference:

“Elastic behavior of porous materials,” Section 17.3.1 of the ABAQUS Analysis User’s Manual

Optional parameters:

DEPENDENCIES

Set this parameter equal to the number of field variable dependencies included in the definition
of the parameters, in addition to temperature. If this parameter is omitted, it is assumed that the
parameters depend only on temperature. See “Specifying field variable dependence” in “Material
data definition,” Section 16.1.2 of the ABAQUS Analysis User’s Manual, for more information.

SHEAR

Set SHEAR=G to define the deviatoric behavior with a constant shear modulus G. Set
SHEAR=POISSON (default) to compute the instantaneous shear modulus from the bulk modulus
and Poisson’s ratio. The Poisson’s ratio should be given on the data lines.

Data lines to define the deviatoric behavior with a constant shear modulus

G

:

First line:

1. Value of the logarithmic bulk modulus, . (Dimensionless.)

2. Value of the shear modulus, G.

3. Value of the elastic tensile limit,

. (This value cannot be negative.)

4. Temperature, .

5. First field variable.

6. Etc., up to four field variables.

Subsequent lines (only needed if the DEPENDENCIES parameter has a value greater than four):

1. Fifth field variable.

16.18–1

ABAQUS Version 6.1

Module: ID:

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