Product: ABAQUS/Explicit
The translator from PAM-CRASH to ABAQUS converts certain keywords in a PAM-CRASH input file into their equivalent in ABAQUS/Explicit.
The translator requires an input file created by PAM-CRASH 2003. The input file can have any name and extension.
The PAM-CRASH data entries that are translated are listed in the tables below. Other PAM-CRASH keywords and data are skipped over and noted in the log file.
The translator creates a partial ABAQUS input file that contains only the model data. You must provide history data (including output data) to complete the input.
Element grouping
Elements that are assigned the same PART identification number are grouped together in an element set.
Except for connector elements that result from the translation of SPRING and KJOIN, section properties need to be entered in the PART section rather than individually in the element section. Elements that have different material or section properties should be given different PART identification numbers; that is, the same material and section properties must be applicable to all elements grouped in the same element set.
For connector elements that result from the translation of SPRING and KJOIN, if elements that have different element data (such as nodes and frame numbers used to define local directions) are assigned the same PART identification number, the translator automatically separates them into different element sets.
Material models
The translator supports only the material models shown in Table 3.2.18–3. All unsupported material models between Types 1 and 99 are translated as bilinear elastic-plastic, and all other material types are translated as linear elastic if a stress-strain law definition is required. In these cases the translator provides nominal values for the material properties.
For all elastic-plastic models the translator supports the use of the auxiliary keyword FFUNCT to define stress-strain laws using a curve description.
History section data
The translator creates a history section based partially on keywords (except TITLE) from the control section of the PAM-CRASH file as shown in Table 3.2.18–1. Other control data are currently unsupported.
Table 3.2.18–1 Control section data.
| PAM-CRASH Keyword | ABAQUS Keyword |
|---|---|
| TITLE | *HEADING |
| RUNEND | *DYNAMIC, EXPLICIT time period |
| TCTRL / DYNA_MASS_SCALE | *VARIABLE MASS SCALING |
Table 3.2.18–2 Part section data.
| PAM-CRASH Keyword | Comment |
|---|---|
| PART / BAR | Truss element properties and grouping data |
| PART / BEAM | Beam element properties and grouping data |
| PART / SPRING | Connector behavior and grouping data |
| PART / KJOIN | Connector type, behavior, and grouping data |
| PART / SOLID | Solid element properties and grouping data |
| PART / SHELL | Shell element properties and grouping data |
| PART / MEMBR | Membrane element properties and grouping data |
| PART / TIED | Mesh tie constraint data and parameters |
| PART / PLINK | Mesh-independent fastener data and parameters |
Table 3.2.18–3 Material section data.
| PAM-CRASH Keyword | Comment |
|---|---|
| MATER / Types 1, 99 | C3D4/C3D6/C3D8R; solid material model data |
| MATER / Types 100, 101, 102, 103 | S3RS/S4RS; shell material model data |
| MATER / Type 150 | M3D3/M3D4R; membrane material model data (isotropic parent sheet only; no fibers) |
| MATER / Types 200, 201 | T3D2/B31; beam and truss material model data |
| MATER / Types 212, 213 | B31; beam material model data |
| MATER / Type 230 | CONN3D2; connector behavior data |
Table 3.2.18–4 Node section data.
| PAM-CRASH Keyword | ABAQUS Keyword |
|---|---|
| FRAME | *ORIENTATION and *TRANSFORM |
| NODE | *NODE |
| MASS | *MASS and *ROTARY INERTIA |
| INVEL | *INITIAL CONDITIONS, TYPE=VELOCITY or ROTATING VELOCITY |
| BOUNC | *BOUNDARY |
Table 3.2.18–5 Element section data.
| PAM-CRASH Keyword | Comment |
|---|---|
| SOLID | C3D4/C3D6/C3D8R and *SOLID SECTION |
| SHELL | S3RS/S4RS and *SHELL SECTION |
| MEMBR | M3D3/M3D4R and *MEMBRANE SECTION |
| BEAM | B31 and *BEAM SECTION, SECTION=CIRC |
| BAR | T3D2 and *SOLID SECTION |
| SPRING | CONN3D2 [CARTESIAN + CARDAN] and *CONNECTOR SECTION |
| KJOIN | CONN3D2 and *CONNECTOR SECTION |
| PLINK | *FASTENER and *FASTENER PROPERTY; CONN3D2 and *CONNECTOR SECTION |
Table 3.2.18–6 Constraint section data.
| PAM-CRASH Keyword | ABAQUS Keyword |
|---|---|
| RWALL (Stationary, segmented finite rigid wall) Velocity flag=0 Wall description=20 | *RIGID BODY and *CONTACT |
| RBODY | *RIGID BODY and/or *MPC (MPC type BEAM) To define a group of elements as a rigid body, enter the part identification number of that element group as the PART entity1. To define an element as a rigid body, enter the element number as the ELE entity or enter all the element node numbers as the NOD entity2. |
| CNTAC Sliding interface types: 33, 34, 36, 46 | *CONTACT, *CONTACT INCLUSIONS, *CONTACT PROPERTY ASSIGNMENT, *CONTACT FORMULATION, *SURFACE INTERACTION, and *SURFACE PROPERTY ASSIGNMENT |
| TIED | *TIE |
| 1 If PART entities are used to define a rigid body, RBODY is translated as *RIGID BODY. | |
| 2 If the ELE and NOD entities constitute all elements in a part, RBODY is translated as *RIGID BODY. If the ELE and NOD entities do not constitute all elements in a part (i.e., if the part consists of both rigid and deformable elements), RBODY is translated as *MPC (MPC type BEAM), a beam-type multi-point constraint for the set of nodes that consists of all input NOD entities and nodes extracted from all ELE entities. | |
Table 3.2.18–7 Nodes/faces/elements entity selection data.
| PAM-CRASH Keyword | Comment |
|---|---|
| ELE | *ELSET; data for elements to be grouped in a set using *ELSET |
| PART | Data for selecting element sets (*ELSET) already defined |
| NOD | Data for nodes to be grouped in a set using *NSET |
| ELE>NOD | Same procedure as ELE |
| PART>NOD | Same procedure as PART |
job
This option is used to specify the name of the ABAQUS input file to be output by the translator. It is also the default name of the file containing the PAM-CRASH data. Diagnostics created by the translator will be written to a file named job-name.log.
input
This option is used to specify the name of the file containing the PAM-CRASH data if the name is different from job-name.