ABAQUS Keywords Reference Manual  

*SORPTION
Define absorption and exsorption behavior.

This option is used to define absorption and exsorption behaviors of a partially saturated porous medium in the analysis of coupled wetting liquid flow and porous medium stress.

Product: ABAQUS/Standard  

Type: Model data

Level: Model  

Reference:

Optional parameters:

LAW

Set LAW=LOG to define the absorption or exsorption behavior by the analytical logarithmic form.

Set LAW=TABULAR (default) to define the absorption or exsorption behavior in tabulated form.

TYPE

Set TYPE=ABSORPTION (default) to define the absorption behavior.

Set TYPE=EXSORPTION to define the exsorption behavior (this must be a repeated use of the option for the same material).

Set TYPE=SCANNING to define the scanning line (this must be a repeated use of the option for the same material).

Data lines for TYPE=ABSORPTION or TYPE=EXSORPTION and LAW=TABULAR: 

First line:

  1. Pore pressure, , with the condition . (Units of FL–2.)

  2. Saturation, . This value must lie in the range .

Repeat this data line as often as necessary to define the relationship between and from to in increasing values of . At least two data lines must be specified.

Data line for TYPE=ABSORPTION or TYPE=EXSORPTION and LAW=LOG: 

First (and only) line:

  1. . This value must be positive. (Dimensionless.)

  2. . This value must be positive. (Units of L2F–1.)

  3. . This value must lie in the range . The default is 0.01.

  4. . This value must lie in the range . The default is 0.01 plus a very small positive number (since cannot be equal to ).

Data line for TYPE=SCANNING: 

First (and only) line:

  1. Slope of the scanning line, . This slope must be positive and larger than the slope of any segment of the absorption or exsorption behavior definitions.