Agent skill
abaqus-static-analysis
Complete workflow for static structural analysis. Use when analyzing stress, displacement, or reaction forces under constant loads. For strength and stiffness evaluation.
Stars
163
Forks
31
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/abaqus-static-analysis
SKILL.md
Abaqus Static Analysis Workflow
Complete workflow for static structural analysis - stress, displacement, and reaction forces under constant loads.
When to Use This Skill
Route here when user mentions:
- "stress analysis", "structural analysis"
- "how much will it deflect", "displacement"
- "is this strong enough", "strength check"
- "factor of safety", "safety factor"
- "reaction forces", "support loads"
- "simulate a load on this part"
Route elsewhere:
- Time-varying loads, impact, vibration →
/abaqus-dynamic-analysis - Natural frequencies, resonance →
/abaqus-modal-analysis - Temperature effects, thermal stress →
/abaqus-coupled-analysis - Heat transfer only →
/abaqus-thermal-analysis - Parts touching, friction →
/abaqus-contact-analysis
Workflow Steps
Execute these skills in order:
| Step | Skill | Purpose |
|---|---|---|
| 1 | /abaqus-geometry |
Create part and assembly |
| 2 | /abaqus-material |
Define material properties |
| 3 | /abaqus-mesh |
Generate finite element mesh |
| 4 | /abaqus-bc |
Apply supports and constraints |
| 5 | /abaqus-load |
Apply forces and pressures |
| 6 | /abaqus-step |
Configure analysis step (optional - default is fine) |
| 7 | /abaqus-job |
Run the analysis |
| 8 | /abaqus-odb |
Extract results |
What to Ask User
Required Information
| Input | What to Ask |
|---|---|
| Geometry | "What are the dimensions? (e.g., 100x50x20 mm)" |
| Material | "What material? (Steel, Aluminum, or custom E/v)" |
| Supports | "How is it supported? (fixed face, pinned points, rollers)" |
| Loads | "What loads? (force magnitude, location, direction)" |
Optional (Has Defaults)
| Input | Default | Ask If |
|---|---|---|
| Mesh size | Auto-calculated | Stress concentrations present |
| Element type | C3D8R | Complex curved geometry |
| Nonlinear | OFF | Large deformation expected |
Key Decisions
Linear vs Nonlinear Analysis
| Condition | Setting | When |
|---|---|---|
| Small deformation, linear material | nlgeom=OFF | Displacements < 1% of part size |
| Large deformation or rotation | nlgeom=ON | Thin structures, rubber, cables |
| Yielding expected | nlgeom=ON + Plasticity | Stress > yield strength |
Default: Start with linear. Switch to nonlinear if convergence issues or large deformation.
What Results to Extract
| User Goal | Output Variables | Acceptance Criteria |
|---|---|---|
| Strength assessment | S (stress), MISES | MISES < yield stress |
| Stiffness check | U (displacement) | Max deflection acceptable |
| Support sizing | RF (reaction force) | Reactions match applied loads |
Validation Checkpoints
After Each Step
| Step | What to Verify |
|---|---|
| Geometry | Part has cells, no error messages |
| Material | Section assigned to all cells |
| Mesh | Node count OK (Learning Edition: <=1000) |
| BCs | At least one fixed constraint exists |
| Loads | Applied to correct surface/point |
| Job | Completes without errors in .sta file |
Results Sanity Checks
| Check | Expected |
|---|---|
| Reaction force sum | Approximately equals applied loads |
| Displacement magnitude | Physically reasonable |
| Stress pattern | Follows logical load path |
| Max stress location | At expected concentration points |
Troubleshooting
| Error | Cause | Solution |
|---|---|---|
| "Zero pivot" | Rigid body motion | Add more BCs to constrain all 6 DOFs |
| "Negative eigenvalue" | Buckling or instability | Check BCs, may need stabilization |
| "Too many increments" | Load too large | Reduce load or use more increments |
| "Equilibrium not achieved" | Convergence failure | Try smaller initial increment |
| "Memory exceeded" | Mesh too fine | Increase element size |
Feedback Loops
- Mesh fails: Return to geometry, add partitions or simplify
- Zero pivot error: Return to BCs, ensure all rigid body modes constrained
- Unreasonable results: Verify material properties, check load direction/sign
- Stress too high: Either design issue (expected) or incorrect BC/load setup
Code Patterns
For API syntax and code examples, see:
Didn't find tool you were looking for?