*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.

This page discusses:

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Sorption

ProductsAbaqus/StandardAbaqus/CAE

TypeModel data

LevelModel

Abaqus/CAEProperty module

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, uw, with the condition uw≤0.0. (Units of FL−2.)

  2. Saturation, s. This value must lie in the range 0.01≤s≤1.0.

Repeat this data line as often as necessary to define the relationship between uw and s from s=0+ to s=1.0 in increasing values of s. At least two data lines must be specified.

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

First (and only) line

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

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

  3. s0. This value must lie in the range 0.01≤s0<s1<0.9. The default is 0.01.

  4. s1. This value must lie in the range 0.01≤s0<s1<0.9. The default is 0.01 plus a very small positive number (since s1 cannot be equal to s0).

Data line for TYPE=SCANNING

First (and only) line

  1. Slope of the scanning line, (d⁢uw/d⁢s)|s. This slope must be positive and larger than the slope of any segment of the absorption or exsorption behavior definitions.