Group data (Solid Section)

Group data

 

Description

 

Here are described the supported keywords to create ParaGeo Group_data.

*SOLID SECTION is the main keyword to create a ParaGeo group from an Abaqus ELSET (defined through *ELEMENT keyword).

*GROUP MERGE is the keyword that allows to define a list of Abaqus ELSETs (defined through *ELEMENT keyword) that will be used to create a single ParaGeo group.

*GROUP DELETE is the keyword that allows to define a list of Abaqus ELSETs (defined through *ELEMENT keyword) that will be deleted during conversion.

 

 

Click to expand/collapseGROUP DELETE    Delete ELSETs during conversion

Usage

*GROUP DELETE  

Description

*GROUP DELETE allows to define a list of Abaqus ELSETs (defined through *ELEMENT keyword) that will be deleted during conversion. The list should be provided in a new line separated by spaces.

 

 

Notes  

•*GROUP DELETE can NOT be used to delete Abaqus ELSETs defined via *ELSET keyword.

 

 

Examples

 

*GROUP MERGE, NAME=Domain

 Volume1

 Volume2

 Volume3

 

*GROUP DELETE

 Volume4

 Volume5

 

*SOLID SECTION, ELSET=Domain, MATERIAL=Sandstone

 

 

 

1Three Abaqus ELSETs (defined through *ELEMENT keyword) named Volume1, Volume2 and Volume3 will be merged to a single ELSET named "Domain" that will be used to create a single ParaGeo group. Volume4 and Volume5 will be deleted.

 

2*SOLID SECTION keywords with the corresponding merged group name must be defined in order to create the ParaGeo group "Domain".

 

3Material "Sandstone" will be assigned to "Domain" ParaGeo group.

 

 

 

Click to expand/collapseGROUP MERGE    Merge ELSETs into individual groups

Usage

*GROUP MERGE,  NAME=Merged_group_name  

Description

*GROUP MERGE allows to define a list of Abaqus ELSETs (defined through *ELEMENT keyword) that will be merged to a single ELSET to create a single ParaGeo group. The list should be provided in a new line separated by spaces. The keyword should be used in conjunction with *SOLID SECTION, which defines a group to be created from an Abaqus ELSET.

 

Compulsory Parameters

NAME

Defines the merged ELSET (group) name. The same name should be specified in parameter NAME= from *SOLID SECTION keyword in order to generate a ParaGeo group.

 

 

Notes  

•*GROUP MERGE can NOT be used to merge Abaqus ELSETs defined via *ELSET keyword.

•If the ELSETs to be merged are split (they do not share nodes) two volumes (or more) will be generated for the ParaGeo group. Conversely, if they share nodes a single volume will be created.

 

 

Examples

 

*GROUP MERGE, NAME=Reservoir

 Volume1

 Volume2

 Volume3

 

*GROUP MERGE, NAME=Overburden

 Volume4

 Volume5

 

*SOLID SECTION, ELSET=Reservoir, MATERIAL=Sandstone

*SOLID SECTION, ELSET=Overburden, MATERIAL=Shale

 

 

1Three ELSETs (defined through *ELEMENT keyword) and named Volume1, Volume2 and Volume3 will be merged to a single ELSET named Reservoir that will be used to create a single ParaGeo group. Volume4 and Volume5 will be merged into a single group named Overburden.

 

2*SOLID SECTION keywords with the corresponding merged group names must be defined in order to create the ParaGeo groups.

 

3Material "Sandstone" and "Shale" will be assigned to Reservoir and Overburden ParaGeo groups respectively.

 

 

 

Click to expand/collapseSOLID SECTION    Solid Section data (group data)

Usage

*SOLID SECTION,   ELSET=Elset_name, MATERIAL=Material_name, AVERAGE PRESSURE=Yes/No  

Description

Defines an ELSET to be converted as a ParaGeo group and allows to assign material data to the ELSET.

 

Compulsory Parameters

ELSET

Defines the name of the Abaqus ELSET which will be converted into a ParaGeo group. If a single ParaGeo group is expected to be created from merged ELSETs using *GROUP MERGE, the name of the merged group must be specified.

MATERIAL

Assigns a material (by name) to the element group. The material should be read from a Material file exported from Matina and should be loaded into the current analysis via the Keyword *MATERIAL

 

 

Optional Parameters

AVERAGE PRESSURE

Defines whether average pressure smoothing formulation should be used in order to smooth the effective mean stress field for triangular and tetrahedral elements. Valid options are:

- YES (Default for Viscoplastic materials, e.g. Salt)

- NO (Default for any other material type)

Note that average pressure is not recommended for parallel simulations.

Note that average pressure smoothing is recommended for modelling viscous material with near zero yield stress in order to minimize volume locking.

Note also that it should be avoided for elastic or elasto-plastic materials with non-zero yield stress or pressure sensitivity constitutive models (e.g. SR3, SR4, Drucker-Prager, Cam-Clay, etc).

 

 

Examples

 

*SOLID SECTION, ELSET=Sandstone, MATERIAL=Sandstone

 

1A *SOLID SECTION for ELSET named Sandstone is defined. This will generate a ParaGeo Group_data.

 

2Material assigned to the ELSET is named "Sandstone".

 

 

*GROUP MERGE, NAME=Reservoir

 Volume1

 Volume2

 Volume3

 

*GROUP MERGE, NAME=Overburden

 Volume4

 Volume5

 

*SOLID SECTION, ELSET=Reservoir, MATERIAL=Sandstone

*SOLID SECTION, ELSET=Overburden, MATERIAL=Shale

 

 

1In this example two ParaGeo groups will be created from five Abaqus ELSETs after merging them using *GROUP MERGE keyword.

 

2Volume1, Volume2 and Volume3 will be merged to create a single ParaGeo group named Reservoir. Volume4 and Volume5 will be merged into a single ParaGeo group named Overburden.

 

3*SOLID SECTION keywords with the corresponding merged group names must be defined in order to create the ParaGeo groups.

 

4Material "Sandstone" and "Shale" will be assigned to Reservoir and Overburden ParaGeo groups respectively.