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abaqus-static-analysis

majiayu000
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About

This skill provides a complete Abaqus workflow for static structural analysis to evaluate stress, displacement, and reaction forces under constant loads. It's designed for strength and stiffness checks, including safety factor calculations. Use this skill for static scenarios, not for dynamic, thermal, or frequency analyses.

Quick Install

Claude Code

Recommended
Plugin CommandRecommended
/plugin add https://github.com/majiayu000/claude-skill-registry
Git CloneAlternative
git clone https://github.com/majiayu000/claude-skill-registry.git ~/.claude/skills/abaqus-static-analysis

Copy and paste this command in Claude Code to install this skill

Documentation

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:

StepSkillPurpose
1/abaqus-geometryCreate part and assembly
2/abaqus-materialDefine material properties
3/abaqus-meshGenerate finite element mesh
4/abaqus-bcApply supports and constraints
5/abaqus-loadApply forces and pressures
6/abaqus-stepConfigure analysis step (optional - default is fine)
7/abaqus-jobRun the analysis
8/abaqus-odbExtract results

What to Ask User

Required Information

InputWhat 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)

InputDefaultAsk If
Mesh sizeAuto-calculatedStress concentrations present
Element typeC3D8RComplex curved geometry
NonlinearOFFLarge deformation expected

Key Decisions

Linear vs Nonlinear Analysis

ConditionSettingWhen
Small deformation, linear materialnlgeom=OFFDisplacements < 1% of part size
Large deformation or rotationnlgeom=ONThin structures, rubber, cables
Yielding expectednlgeom=ON + PlasticityStress > yield strength

Default: Start with linear. Switch to nonlinear if convergence issues or large deformation.

What Results to Extract

User GoalOutput VariablesAcceptance Criteria
Strength assessmentS (stress), MISESMISES < yield stress
Stiffness checkU (displacement)Max deflection acceptable
Support sizingRF (reaction force)Reactions match applied loads

Validation Checkpoints

After Each Step

StepWhat to Verify
GeometryPart has cells, no error messages
MaterialSection assigned to all cells
MeshNode count OK (Learning Edition: <=1000)
BCsAt least one fixed constraint exists
LoadsApplied to correct surface/point
JobCompletes without errors in .sta file

Results Sanity Checks

CheckExpected
Reaction force sumApproximately equals applied loads
Displacement magnitudePhysically reasonable
Stress patternFollows logical load path
Max stress locationAt expected concentration points

Troubleshooting

ErrorCauseSolution
"Zero pivot"Rigid body motionAdd more BCs to constrain all 6 DOFs
"Negative eigenvalue"Buckling or instabilityCheck BCs, may need stabilization
"Too many increments"Load too largeReduce load or use more increments
"Equilibrium not achieved"Convergence failureTry smaller initial increment
"Memory exceeded"Mesh too fineIncrease 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:

GitHub Repository

majiayu000/claude-skill-registry
Path: skills/data/abaqus-static-analysis

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