Abaqus Field Skill
This skill defines initial conditions and predefined fields in Abaqus. Use it to set starting states or import results from previous analyses.
When to Use This Skill
Route here when user mentions:
- "initial temperature", "starting temperature", "the part starts at..."
- "pre-stress", "residual stress", "initial stress"
- "initial velocity" (for impact/explicit dynamics)
- "import temperature from thermal analysis"
- "transfer results from previous analysis"
- "bolt pre-tension", "bolt preload"
Route elsewhere:
- Fixed temperature boundary conditions →
/abaqus-bc
- Heat flux, convection, radiation loads →
/abaqus-load
- Time-varying fields via amplitude →
/abaqus-amplitude
Key Decisions
Field Type Selection
| User Need |
Field Type |
Typical Use |
| Starting temperature |
Temperature |
Thermal stress from uniform T |
| Residual stress |
Stress |
Pre-stressed members |
| Impact velocity |
Velocity |
Explicit dynamics |
| From other analysis |
Predefined Temperature |
Sequential thermal-structural |
| Custom variable |
Predefined Field |
User-defined behaviors |
Distribution Type
| Type |
When to Use |
| UNIFORM |
Same value everywhere |
| FROM_FILE |
Import from ODB or FIL |
| ANALYTICAL_FIELD |
Expression-based (X, Y, Z) |
| USER_DEFINED |
Via user subroutine |
What to Ask User
If information is missing, ask:
- What initial condition? Temperature, stress, velocity, or custom field?
- Uniform or varying? Same value everywhere or position-dependent?
- Import from ODB? If transferring, which file/step/frame?
- Region? Entire model or specific region?
- Value(s)? Magnitude, stress components, or velocity vector?
Workflow: Setting Up Fields
Step 1: Identify Field Type
Match user request to field type:
- Temperature values → Temperature field
- Stress state → Stress field
- Moving parts → Velocity field
- Previous analysis results → FROM_FILE distribution
Step 2: Define Region
Determine where the field applies:
- Entire model (assembly set)
- Specific part instance
- Element set or node set
Step 3: Set Values or Import
For uniform fields: specify single magnitude or component values.
For imported fields: ODB path, step name, increment number.
Step 4: Verify Step
Initial conditions use createStepName='Initial'.
Predefined fields in analysis steps use the step name.
Sequential Thermal-Structural Workflow
- Run thermal analysis, save ODB
- Import temperature as predefined field in structural model
- Temperature causes thermal strain (requires expansion coefficient)
Key Parameters
| Parameter |
Notes |
createStepName |
'Initial' for initial conditions, step name for predefined |
distributionType |
UNIFORM, FROM_FILE, ANALYTICAL_FIELD |
fileName |
ODB path for FROM_FILE distribution |
beginStep/endStep |
Frame selection for ODB import |
Validation Checklist
Troubleshooting
| Problem |
Likely Cause |
Solution |
| Field not applied |
Wrong region or step |
Verify region covers elements |
| Cannot read from ODB |
ODB locked or wrong path |
Close other sessions, check path |
| Temperature mismatch |
Mesh incompatibility |
Use mapping tolerance options |
| Stress equilibrium error |
Stress not self-equilibrating |
Review stress field consistency |
Code Patterns
For API syntax and code examples, see references/ folder.
1---2name: abaqus-field3description: Define initial conditions and predefined fields. Use when user mentions initial temperature, pre-stress, residual stress, or import from previous analysis.4---56# Abaqus Field Skill78This skill defines initial conditions and predefined fields in Abaqus. Use it to set starting states or import results from previous analyses.910## When to Use This Skill1112**Route here when user mentions:**13- "initial temperature", "starting temperature", "the part starts at..."14- "pre-stress", "residual stress", "initial stress"15- "initial velocity" (for impact/explicit dynamics)16- "import temperature from thermal analysis"17- "transfer results from previous analysis"18- "bolt pre-tension", "bolt preload"1920**Route elsewhere:**21- Fixed temperature boundary conditions → `/abaqus-bc`22- Heat flux, convection, radiation loads → `/abaqus-load`23- Time-varying fields via amplitude → `/abaqus-amplitude`2425## Key Decisions2627### Field Type Selection2829| User Need | Field Type | Typical Use |30|-----------|------------|-------------|31| Starting temperature | Temperature | Thermal stress from uniform T |32| Residual stress | Stress | Pre-stressed members |33| Impact velocity | Velocity | Explicit dynamics |34| From other analysis | Predefined Temperature | Sequential thermal-structural |35| Custom variable | Predefined Field | User-defined behaviors |3637### Distribution Type3839| Type | When to Use |40|------|-------------|41| UNIFORM | Same value everywhere |42| FROM_FILE | Import from ODB or FIL |43| ANALYTICAL_FIELD | Expression-based (X, Y, Z) |44| USER_DEFINED | Via user subroutine |4546## What to Ask User4748If information is missing, ask:491. **What initial condition?** Temperature, stress, velocity, or custom field?502. **Uniform or varying?** Same value everywhere or position-dependent?513. **Import from ODB?** If transferring, which file/step/frame?524. **Region?** Entire model or specific region?535. **Value(s)?** Magnitude, stress components, or velocity vector?5455## Workflow: Setting Up Fields5657### Step 1: Identify Field Type58Match user request to field type:59- Temperature values → Temperature field60- Stress state → Stress field61- Moving parts → Velocity field62- Previous analysis results → FROM_FILE distribution6364### Step 2: Define Region65Determine where the field applies:66- Entire model (assembly set)67- Specific part instance68- Element set or node set6970### Step 3: Set Values or Import71For uniform fields: specify single magnitude or component values.72For imported fields: ODB path, step name, increment number.7374### Step 4: Verify Step75Initial conditions use `createStepName='Initial'`.76Predefined fields in analysis steps use the step name.7778## Sequential Thermal-Structural Workflow79801. Run thermal analysis, save ODB812. Import temperature as predefined field in structural model823. Temperature causes thermal strain (requires expansion coefficient)8384## Key Parameters8586| Parameter | Notes |87|-----------|-------|88| `createStepName` | 'Initial' for initial conditions, step name for predefined |89| `distributionType` | UNIFORM, FROM_FILE, ANALYTICAL_FIELD |90| `fileName` | ODB path for FROM_FILE distribution |91| `beginStep/endStep` | Frame selection for ODB import |9293## Validation Checklist9495- [ ] Correct field type for the physics96- [ ] Region covers intended elements/nodes97- [ ] Step name is correct (Initial vs analysis step)98- [ ] For FROM_FILE: ODB exists and contains required data99- [ ] For thermal stress: material has expansion coefficient100101## Troubleshooting102103| Problem | Likely Cause | Solution |104|---------|--------------|----------|105| Field not applied | Wrong region or step | Verify region covers elements |106| Cannot read from ODB | ODB locked or wrong path | Close other sessions, check path |107| Temperature mismatch | Mesh incompatibility | Use mapping tolerance options |108| Stress equilibrium error | Stress not self-equilibrating | Review stress field consistency |109110## Code Patterns111112For API syntax and code examples, see `references/` folder.
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