ParaGeo Conversion

ParaGeo Conversion

 

Description

 

PARAGEO CONVERSION defines the options for converting the Abaqus mesh (.mesh) to ParaGeo geometry file (.geo).  A key difference between Abaqus and ParaGeo is that the model for ParaGeo is defined in terms of geometry (points, lines, surfaces and volumes) rather than just a finite element mesh.  The conversion process automatically generates the appropriate geometry from the Abaqus mesh using a combination of geometry rules.  e.g. in 3-D

1Volumes will be generated for each element set,

2Surfaces will be generates at the intersection of each element set,

3Surfaces will be generated for each NSET or ELSET that defines a boundary surface,

4Lines will be generated at the boundaries of inersecting surfaces,

5etc

Here the keyword and sub-keywords to define the specific options for this conversion process and the result is a ParaGeo geometry file (.geo) and a ParaGeo data file (.dat) that incorporates data to read the geometry file and the additional data that defines the problem.

In addition to converting Abaqus (.inp) to ParaGeo (.dat) files, PARAGEO CONVERSION can also output geometry in ELFEN format.   The additional data that can be generated for ELFEN is however more limited.

 

 

PARAGEO CONVERSION    Conversion of Abaqus mesh to ParaGeo geometry

Usage

*PARAGEO CONVERSION,  TYPE=Conversion_type, PARAGEO FILE=File_name, ELFEN FILE=File_name,   SUB-DIRECTORY=Sub-directory_Name

Description

This data structure is used to convert Abaqus mesh to ParaGeo geometry. This will output a .geo file that will contain the model geometry with conversion of ELSETs to ParaGeo Groups and conversion of NSETs to ParaGeo Geometry Sets.

 

Compulsory Parameters

TYPE

Defines the type of conversion performed with valid options being:

- GROUP:  This option will generate the minimum geometry required for the problem (boundaries). Consequently some group interfaces will not be separated by geometry surfaces. This is required in some cases were formation interfaces are complex, jagged boundaries, etc.

- GEOMETRY:  This option will generate all geometry entities.

Notes:

•If TYPE=GROUP, ParaGeo will convert 3-D surface elements to TSET for use

•If TYPE=GEOMETRY, ParaGeo will convert 3-D surface elements to NSET for use

 

Optional Parameters

PARAGEO FILE

Defines the name of the ParaGeo file that will contain the Geometry_data to read the converted geometry.

ELFEN FILE

Defines the name of the Elfen file that will contain the appropriate data structure to read the converted geometry.

SUB-DIRECTORY

If defined allows to provide a name for a Sub-directory that will be created in which the converted data required for simulation will be output. If non-simulation files are output (e.g. a mesh plot file) after conversion, they will be placed into the current .inp folder.

 

 

Sub-Keywords
hmtoggle_plus1*CONVERSION INCLUDE         Addtional data to be pasted into the ParaGeo data file

Usage

*CONVERSION INCLUDE, FILE=File_name

Description

This sub-keyword allows to include data defined in an additional file into the generated ParaGeo file after Abaqus mesh to ParaGeo geometry conversion. The data will be pasted into the generated datafile in ParaGeo format.  This is only required if data that cannot be generated via the Abaqus to ParaGeo conversion is to be added to the .dat file.

 

Compulsory Parameters

FILE

Defines the name of the file (with extension) containing the data to be pasted into the generated ParaGeo file. Note that the file should be placed into the same folder as the main datafile.

 
hmtoggle_plus1*CONVERSION OPTIONS         Mesh to Geometry conversion general options

Usage

*CONVERSION OPTIONS, SURFACE SPLIT=Yes_or_No,  LINE SPLIT=Yes_or_No, QUALITY=Value

Description

This sub-keyword allows for set up of conversion options.

 

Optional Parameters

SURFACE SPLIT

Defines whether geometry surfaces should be spit using geometric considerations; e.g. sharp changes in facet angle between adjacent facets. Note that for poorly defined geometry splitting via geometrical considerations can result in a large number of surfaces.  Valid options are:

- YES Split surfaces based on adjacent facet angle (Default, Default max facet angle = 25)

- NO Assemble complete surfaces irrespective of geometry considerations

SURFACE SPLIT ANGLE

Defines the maximum facet angle for surface creation

LINE SPLIT

Defines whether geometry lines should be spit using geometric considerations; e.g. sharp changes in facet angle between adjacent facets. Note that for poorly defined geometry splitting via geometrical considerations can result in a large number of lines. Valid options are:

- YES Split lines based on adjacent facet angle (Default)

- NO Assemble complete lines irrespective of geometry considerations

QUALITY

Defines Flag indicating that quality check on the mesh should be performed and to what level of detail.  In large 3-D models a high level of quality check can be relatively expensive computationally.    Valid options are:

- 0 - Do not perform quality checks on lines and surfaces

- 1 - Perform quality checks on lines and surfaces (default)

- 2 - Perform quality checks on lines only

- 3 - Perform quality checks on surfaces only.

 
hmtoggle_plus1*CONVERSION OUTPUT         Mesh to geometry conversion output options

Usage

*CONVERSION OUTPUT

Description

This sub-keyword allows to output a Mesh and Geometry plot files for visualization in Paraview after Abaqus mesh to ParaGeo geometry conversion.

 

Optional Parameters

LEVEL

Defines the level of data output to the log (.res) file during Abaqus mesh to ParaGeo geometry conversion. Valid values are:

- 0 : No data output

- 1 : Output of summary data

- 2 : Output of detailed data (Default)

GEOMETRY

Defines whether a geometry plot file should be output after mesh to geometry conversion. Valid options are:

- YES (Default)

- NO

MESH

Defines whether a mesh plot file should be output after mesh to geometry conversion. Valid options are:

- YES (Default)

- NO

 

 

 

Examples

 

*PARAGEO CONVERSION, TYPE=GROUP, PARAGEO FILE=Model1, SUB-DIRECTORY=Simulation_data

*CONVERSION OUTPUT, LEVEL=2, GEOMETRY=YES, MESH=YES

 

1The Abaqus mesh to ParaGeo geometry will be performed generating the minimum geometry generation required.

2The generated datafile with the ParaGeo model will be named "Model1"

3All data generated after conversion will be placed in a directory named Simulation_data.

4Detailed information from the conversion will be output into the log (.res) file.

5Geometry and Mesh plots after conversion will be output