ABAQUS Volume II: I–Z - Manual (Page 265)

*PIPE-SOIL STIFFNESS
16.10 *PIPE-SOIL STIFFNESS: Define constitutive behavior for pipe-soil interaction
elements.
This option is used to define the constitutive behavior for pipe-soil interaction elements. It can be used only
in conjunction with the *PIPE-SOIL INTERACTION option. Repeat the option as needed to define behavior
in the different local directions.
Product: ABAQUS/Standard
Type: Model data
Level: Part, Part instance
References:
•
“Pipe-soil interaction elements,” Section 26.13.1 of the ABAQUS Analysis User’s Manual
•
“Pipe-soil interaction element library,” Section 26.13.2 of the ABAQUS Analysis User’s Manual
•
“UMAT,” Section 1.1.31 of the ABAQUS User Subroutines Reference Manual
•
*PIPE-SOIL INTERACTION
Optional parameters:
DEPENDENCIES
Set this parameter equal to the number of field variable dependencies included in the definition
of the material property values. If this parameter is omitted, it is assumed that the properties are
independent of field variables. See “Using the DEPENDENCIES parameters to define field variable
dependence” in “Material data definition,” Section 16.1.2 of the ABAQUS Analysis User’s Manual
for more information.
DIRECTION
Set this parameter equal to the direction in the local orientation system for which the behavior is
defined. The DIRECTION parameter can be set equal to a label or to a numerical value. Omit the
DIRECTION parameter to define an isotropic model. The DIRECTION parameter must be used to
define a constitutive model using the ASCE formulae.
Set DIRECTION=AXIAL (or DIRECTION=1) to specify behavior along the first local
direction.
Set DIRECTION=VERTICAL (or DIRECTION=2) to specify behavior along the second local
direction.
Set DIRECTION=HORIZONTAL (or DIRECTION=3) to specify behavior along the third
local direction.
16.10–1
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