Mesh data

Usage

*ELEMENT, TYPE=Element_type, ELSET=Element_set_name

Description

Defines element data which forms an ELSET in the following coma separated value format (example for a tetrahedral element):

Value 1	Value 2	Value 3	Value 4	Value 5
Element number	Node 1 number	Node 2 number	Node 3 number	Node 4 number

Compulsory Parameters

TYPE

Defines the element type. The valid element input types are listed in the following table together with the ParaGeo element type in which they are converted:

Type	Description	ParaGeo element type	ParaGeo element type number
CPE3	3 nodes 2D plane strain elements	TPM3V	10
CPE4	4 nodes 2D plane strain elements	QPM4V	7
CPS3	3 nodes 2D plane stress elements	TPM3V	10
CPS4	4 nodes 2D plane stress elements	QPM4V	7
CAX3	3 nodes 2D axisymmetric elements	TAX3	11
CAX4	4 nodes 2D axisymmetric elements	QAX4	9
C3D4	4 nodes 3D tetrahedral elements	TET4V	12
C3D5	5 nodes 3D pentahedral elements		4
C3D6	6 nodes 3D pentahedral elements		2
C3D8	8 nodes 3D hexahedral elements	HEX8	3

ELSET

Defines the name of the ELSET defined via *ELEMENT data. Element sets defined this manner are converted into ParaGeo groups if *SOLID SECTION keyword is used.

Notes

•The number of values in each row will be dependant on the element type (number of nodes per element).

•*ELEMENT keyword with 2D elements in 3D problems may be used to generate TSETs that may be converted to ParaGeo geometry sets using the *TSET TYPE keyword.

Examples

*ELEMENT, TYPE=CPE4, ELSET=Sandstone

1, 1, 2, 4, 3

2, 3, 4, 6, 5

3, 5, 6, 8, 7

1Three structured 4 nodes 2D plane strain elements are defined

2Note that topology (node numbers) should be defined in a valid order (node numbers order should define contiguous nodes which can be jointed by lines.

Usage

*ELSET, ELSET=Elset_name, ELSET=Element_set_name, GENERATE

Description

Defines a list of element numbers which forms an ELSET. The standard definition of an ELSET considers the input values as coma separated values in the following format:

Value 1	Value 2	...	Value n
Element 1 number ,	Element 2 number ,	...	Element n number ,

In case the optional parameter GENERATE is used, then the data defining the ELSET should be provided in the following format:

Value 1	Value 2	Value 3
Start Element number ,	End Element number ,	Increment in Element numbers

Then the ELSET will contain all element numbers between the Start and End element numbers (both inclusive) in the specified increment between consecutive values.

Compulsory Parameters
ELSET	Defines the name of the ELSET defined via *ELSET data. Element sets defined this manner may be converted into ParaGeo Geometry_set data

Optional Parameters
GENERATE	Defines the name of the ELSET defined via *ELSET data. Element sets defined this manner may be converted into ParaGeo Geometry_set data

Examples

*ELSET, ELSET=Sandstone

456, 458, 460, ... 474,

476, 478, 480, ... 494,

496, 498,

1Al ELSET named Sandstone is defined in the "standard" format by listing all the element numbers in the ELSET.

2Note the first element number is 456, the increment between successive element numbers is 2 and the last element in the ELSET is number 498

*ELSET, ELSET=Sandstone02, GENERATE

456, 498, 2

1The optional parameter GENERATE is used in this example in order to define an equivalent ELSET to the previous example.

Usage

*ELSET TYPE, DEFAULT=Default_type

Description

This keyword allows to define the appropriate type of geometry entity for NSET to Geometry_set conversion in case is not defined by specifying parameter TYPE in the *NSET keyword. Valid options are:

- LINE

- SURFACE

- VOLUME

- NODE / NODAL

- NONE (this will not create a Geometry_set for the ELSET)

The data should be provided as a list into the following format:

ELSET1	,	Geometry type
ELSET2	,	Geometry type
...
ELSETn	,	Geometry type

Optional Parameters
DEFAULT	Defines the default type that will be assigned to all ELSETs which are not specifically assigned a type within the *ELSET TYPE keyword

Notes

•This data structure is generally required for proper data conversion if defined ELSETs have not had TYPE parameter set.

Examples

*ELSET TYPE, DEFAULT=None

Base, Surface

Top, Surface

West, Surface

East, Surface

North, Surface

South, Surface

Domain, Volume

NE_edge, Line

1In this case the default type is defined as NONE, so any ELSET which is not specifically assigned a type will not be used to generate a Geometry_set

2In the present example there are 6 surface ELSETs corresponding to side boundaries, 1 ELSET corresponding to the domain and 1 ELSET corresponding to the edge line between North and East boundaries

Usage

*NODE

Description

Defines nodal data in the following coma separated value format:

Value 1	Value 2	Value 3	Value 4
Node number	X coordinate	Y coordinate	Z coordinate

Examples

*NODE

1, 0, 0, 0

2, 100, 0, 0

3, 0, 100, 0

4, 100, 100, 0

5, 0, 200, 0

6, 100, 200, 0

7, 0, 300, 0

8, 100, 300, 0

1Eight nodes are defined with their corresponding X, Y and Z coordinates

Usage

*NSET, NAME=Node_set_name, TYPE=Nset_type

Description

Defines a series of nodes which will be grouped in a nodal set. This is equivalent to a ParaGeo Geometry_set. The node list should be provided separated by commas as follows:

Value 1	Value 2	. . .	Value n
Node 1 number	Node 2 number	. . .	Node n number

Compulsory Parameters

NAME

Defines the name for the node set

TYPE

Defines the type of geometry entity represented by the NSET. This is important in defining how geometry is created using he NSET nodes. Alternatively, the NSET type can be specified via the separate keyword *NSET TYPE. Valid options are:

- LINE

- SURFACE

- VOLUME

- NODE / NODAL

- NONE (this will not create a Geometry_set for the NSET)

Examples

*NSET, NSET=Base

1,2

*NSET, NSET=West

1,3,5,7,9,11,13,15,17,19,21

*NSET, NSET=East

2,4,6,8,10,12,14,16,18,20,22

*NSET, NSET=Top

21,22

1Four NSETs are defined. Each NSET will be converted to ParaGeo Geometry_set data structure.

Usage

*NSET TYPE, DEFAULT=Default_type

Description

This keyword allows to define the appropriate type of geometry entity for NSET to Geometry_set conversion in case is not defined by specifying parameter TYPE in the *NSET keyword. Valid options are:

- LINE

- SURFACE

- VOLUME

- NODE / NODAL

- NONE (this will not create a Geometry_set for the NSET)

The data should be provided as a list into the following format:

NSET1	,	Geometry type
NSET2	,	Geometry type
...
NSETn	,	Geometry type

Optional Parameters
DEFAULT	Defines the default type that will be assigned to all NSETs which are not specifically assigned a type within the *NSET TYPE keyword

Notes

•This data structure is required if defined NSETs have not had TYPE parameter set.

Examples

*NSET TYPE

Base, Line

Top, Line

West, Line

East, Line

1Four NSETs previously defined are set as Line geometric entities.

Usage

*SURFACE, NAME=Surface_name, TYPE=Surface_type

Description

*SURFACE keyword may be used to define a surface entity from a list of previously defined ELSETs or NSETs in the Abaqus mesh. This will be used to generate ParaGeo Geometry_set data containing the surface entities.

Compulsory Parameters

NAME

Defines the name for the surface

TYPE

Defines whether the surface is created from a list of ELSETs or NSETs. Valid options are:

- ELEMENT

- NODE

The data should be provided as a list of the following format for ELSETs:

ELSET1	,	Face / Edge ID (optional)
ELSET2	,	Face / Edge ID (optional)
...
ELSETn	,	Face / Edge ID (optional)

Or if defined in terms of NSETs should follow the format below:

NSET1	,	Area (optional)
NSET2	,	Area (optional)
...
NSETn	,	Area (optional)

Examples

*SURFACE, NAME=Surf01, TYPE=ELEMENT

Surf01_SubSurf_A, S2

Surf01_SubSurf_B, S5

Surf01_SubSurf_C, S6

1Geometry_set data named Surf01 will be created. This will contain the surfaces corresponding to the specified sides of each element set in the list.

2Note that "Surf01_SubSurf_A" , "Surf01_SubSurf_B" and "Surf01_SubSurf_C" are names of previously defined ELSETs.

*SURFACE, NAME=Surf02, TYPE=NODE

Surf02_SubSurf_A, 745.56

Surf02_SubSurf_B, 362.60

Surf02_SubSurf_C, 803.72

1Geometry_set data named Surf02 will be created. This will contain the surfaces defined by all nodes of the different NSETs in the list.

2Note that "Surf02_SubSurf_A" , "Surf02_SubSurf_B" and "Surf02_SubSurf_C" are names of previously defined NSETs.

Usage

*TSET TYPE, DEFAULT=Default_type

Description

2D *ELEMENT data in 3D problems may be used to create TSETs that later can be converted to ParaGeo Geometry_set data. This keyword allows to provide a list of the potential TSETs to define their type and thus consider whether they should be converted to Geometry_set surfaces or not. Valid options for the type are:

- SURFACE

- NONE (this will not create a Geometry_set for the TSET)

The data should be provided as a list into the following format:

TSET1	,	Geometry type
TSET2	,	Geometry type
...
TSETn	,	Geometry type

Optional Parameters
DEFAULT	Defines the default type that will be assigned to all TSETs which are not specifically assigned a type within the *TSET TYPE keyword

Notes

•If not defined all TSETs will be ignored (so all will be type NONE)

Examples

*TSET TYPE

Base, Surface

Top, Surface

West, None

East, None

North, None

South, None

1Geometry_set data will be created for Base and Top TSETs only.