structure geogrid property command

Syntax

structure geogrid property keyword ... <range>

Primary keywords:

density    thermal-expansion    thickness    coupling-cohesion    coupling-friction    coupling-stiffness    slide    slide-tolerance

Assign properties to geogrid elements in the range. The properties consist of constitutive model properties, shell-type properties, and coupling-spring properties. The constitutive model property names are primary keywords, but are not included in the list above. The following properties are available, with the constitutive model properties listed first.

Shell Constitutive Model Properties

All shell constitutive models have properties associated with them. Properties are name value pairs, where the name is the keyword given in the command and the value type is specific to the property. The assignment will affect any shell-type element in the specified range whose constitutive model includes the property named (noting that some properties, such as young, appear in multiple shell constitutive models). There are six shell constitutive models: three elastic models, and three elastic-plastic models.

Shell Elastic Constitutive Models

• Elastic

  The isotropic elastic model: properties, description.

• Orthotropic

  The orthotropic elastic model: properties, description.

• Anisotropic

  The anisotropic elastic model: properties, description.

Shell Elastic-Plastic Constitutive Models

• Mohr Coulomb

  The Mohr Coulomb elasto-plasticity model in plane-stress mode: properties, model description, plastic-modeling description.

• Mohr Coulomb Strain Softening

  The strain-softening/hardening Mohr Coulomb elasto-plasticity model in plane-stress mode: properties, model description, plastic-modeling description.

• von Mises

  The von Mises elasto-plasticity model in plane-stress mode: properties, model description, plastic-modeling description.

Shell-Type Properties

These are the properties of the shell material (see Shell-Type Properties).

density f

mass density

thermal-expansion f

thermal-expansion coefficient

thickness f

thickness

Coupling-Spring Properties

The coupling springs connect the geogrid to the target object (zones in FLAC3D and 3DEC, and particles in PFC3D). Refer to Geogrid Properties for a detailed description of the coupling-spring properties.

coupling-cohesion f

coupling spring cohesion (stress units)

coupling-friction f

coupling spring friction angle (degrees)

coupling-stiffness f

coupling spring stiffness per unit area

slide b

large-strain sliding flag

slide-tolerance f

large-strain sliding tolerance