Agent skill

Fea Structural

by Cai-aa in Cai-aa/CAE-Agent-Hub

Deep integration with finite element analysis tools for structural simulation across static, dynamic, and nonlinear domains

MITAuto-check: notesResearch & Science

Install Fea Structural

skills CLI
$ npx skills add Cai-aa/CAE-Agent-Hub --skill fea-structural -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Cai-aa/CAE-Agent-Hub fea-structural --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Cai-aa/CAE-Agent-Hub.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Skill/abaqus/reference/fea-structural .claude/skills/fea-structural && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
fea-structural
GitHub stars
998
Used in
1 other repo
Token cost
~1.4k tokens
SKILL.md length
407 words
Files
3
Skills in repo
57
Repo updated
First seen
Licence
MIT

At a glance

Deep integration with finite element analysis tools for structural simulation across static, dynamic, and nonlinear domains

  • Works in 2 steps: CAD Import and Cleanup → Geometry Partitioning
  • Tasks that involve Physical and earth sciences
  • SKILL.md covers Purpose, Capabilities, Usage Guidelines and Process Integration, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Fea Structural is an agent skill from Cai-aa/CAE-Agent-Hub. Deep integration with finite element analysis tools for structural simulation across static, dynamic, and nonlinear domains

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `UPSTREAM.md` and `UPSTREAM_LICENSE.md`).

It sits in Research & Science, covering Physical and earth sciences. The licence is MIT.

When your agent uses it

  • Tasks that involve Physical and earth sciences

Example prompts

  • “/fea-structural”

Requirements

  • Pre-approved tools (allowed-tools): Read, Write, Glob, Grep, Bash

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

  1. CAD Import and Cleanup
  2. Geometry Partitioning

What it can do on your machine

Read from SKILL.md and the folder at commit 194ef49. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Glob
    • Grep
    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are json).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Fea Structural loads about 1.4k tokens when it runs. Until then it costs about 35 tokens; SKILL.md has 407 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~35
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Write, Glob, Grep, Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Cai-aa/CAE-Agent-Hub at commit 194ef49, republished under its MIT licence (© Cai-aa). 407 words, ~1,385 tokens.

Download SKILL.mdSave it as .claude/skills/fea-structural/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
fea-structural
description
Deep integration with finite element analysis tools for structural simulation across static, dynamic, and nonlinear domains
allowed-tools
Read, Write, Glob, Grep, Bash
metadata.specialization
mechanical-engineering
metadata.domain
science
metadata.category
structural-analysis
metadata.priority
high
metadata.phase
1
metadata.tools-libraries
ANSYS Mechanical, Abaqus, MSC NASTRAN, HyperMesh, Femap

Finite Element Analysis Skill

Purpose

The Finite Element Analysis skill provides deep integration with FEA tools for structural simulation, enabling systematic setup, execution, and post-processing of finite element models across static, dynamic, and nonlinear analysis domains.

Capabilities

  • ANSYS Mechanical, Abaqus, NASTRAN model setup and execution
  • Mesh generation strategies and quality assessment
  • Element type selection and convergence studies
  • Boundary condition specification and load case management
  • Linear and nonlinear static analysis configuration
  • Results post-processing and margin of safety calculation
  • Mesh independence and sensitivity studies
  • Report generation with stress/deflection contours

Usage Guidelines

Model Setup
Geometry Preparation
  1. CAD Import and Cleanup

    • Defeature small holes and fillets (analysis dependent)
    • Remove unnecessary detail
    • Verify watertight geometry
    • Create symmetry conditions if applicable
  2. Geometry Partitioning

    • Partition for mesh control
    • Create virtual topology for hex meshing
    • Identify contact surfaces
    • Define load application regions
Mesh Generation
  1. Element Selection

    Analysis TypeRecommended Elements
    Static stressHex20, Tet10, Quad8
    Thin structuresShell (QUAD4/8, TRIA3/6)
    Beam structuresBEAM/BAR elements
    ContactLinear elements preferred
    NonlinearReduced integration with hourglass control
  2. Mesh Quality Criteria

    Aspect ratio: < 5 (< 3 preferred)
    Jacobian: > 0.6
    Warpage: < 15 degrees
    Skewness: < 0.8
  3. Mesh Refinement

    • Refine at stress concentrations
    • Transition ratios < 1.5
    • Multiple elements through thickness
    • Convergence study requirements
Analysis Configuration
Boundary Conditions
  1. Constraints

    • Fixed (all DOF constrained)
    • Pinned (translations fixed, rotations free)
    • Symmetry (appropriate DOF constrained)
    • Prescribed displacement
  2. Best Practices

    • Avoid over-constraint
    • Use RBE2/RBE3 for load distribution
    • Consider realistic support stiffness
    • Document all assumptions
Show full SKILL.md (188 more words)Show less
Load Application
  1. Load Types

    • Pressure (uniform, hydrostatic)
    • Force (point, distributed)
    • Moment/torque
    • Thermal loads
    • Inertial loads (gravity, acceleration)
  2. Load Cases

    • Define all operational load cases
    • Include limit and ultimate factors
    • Combine per applicable standards
    • Document load derivation
Results Post-Processing
Stress Evaluation
  1. Stress Quantities

    • von Mises (ductile materials)
    • Principal stresses (fatigue, brittle)
    • Membrane + bending (shells)
    • Interlaminar (composites)
  2. Margin of Safety

    MS = (Allowable / Applied) - 1
    MS > 0 indicates positive margin
  3. Reporting

    • Maximum stress location and value
    • Stress contour plots
    • Deflection summary
    • Reaction forces verification

Process Integration

  • ME-006: Finite Element Analysis (FEA) Setup and Execution
  • ME-007: Stress and Deflection Analysis
  • ME-009: Nonlinear Structural Analysis

Input Schema

json
{
  "geometry": "CAD file path or description",
  "material": {
    "name": "string",
    "E": "number (Pa)",
    "nu": "number",
    "yield": "number (Pa)",
    "ultimate": "number (Pa)"
  },
  "loads": [
    {
      "type": "pressure|force|moment|thermal",
      "magnitude": "number",
      "location": "string",
      "direction": "array [x,y,z]"
    }
  ],
  "constraints": [
    {
      "type": "fixed|pinned|symmetry",
      "location": "string",
      "dof": "array"
    }
  ],
  "analysis_type": "static|modal|nonlinear",
  "output_requests": ["stress", "displacement", "reactions"]
}

Output Schema

json
{
  "analysis_results": {
    "max_stress": {
      "von_mises": "number (Pa)",
      "location": "string",
      "element_id": "number"
    },
    "max_displacement": {
      "magnitude": "number (m)",
      "location": "string",
      "node_id": "number"
    },
    "reaction_forces": {
      "total": "array [Fx, Fy, Fz, Mx, My, Mz]"
    }
  },
  "margin_of_safety": {
    "yield": "number",
    "ultimate": "number",
    "critical_location": "string"
  },
  "mesh_quality": {
    "element_count": "number",
    "worst_aspect_ratio": "number",
    "convergence_status": "string"
  }
}

Best Practices

  1. Always perform mesh convergence studies for critical analyses
  2. Verify reaction forces match applied loads
  3. Check for rigid body modes in modal analysis
  4. Use appropriate element formulations for contact
  5. Document all modeling assumptions and simplifications
  6. Compare results with hand calculations where possible

Integration Points

  • Connects with CAD Modeling for geometry import
  • Feeds into Fatigue Life Prediction for durability assessment
  • Supports Test Correlation for model validation
  • Integrates with Thermal Analysis for coupled problems

© Cai-aa, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files in Skill/abaqus/reference/fea-structural of Cai-aa/CAE-Agent-Hub.

  • SKILL.md
  • UPSTREAM.md
  • UPSTREAM_LICENSE.md

Open the folder on GitHubat commit 194ef49

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Cai-aa/CAE-Agent-Hub, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Fea Structural next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

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Questions about Fea Structural

What does Fea Structural do?

Deep integration with finite element analysis tools for structural simulation across static, dynamic, and nonlinear domains. Fea Structural is an agent skill from Cai-aa/CAE-Agent-Hub.

When should I use Fea Structural?

Fea Structural fits situations like: tasks that involve Physical and earth sciences.

How do I install Fea Structural in Claude Code?

Run `npx skills add Cai-aa/CAE-Agent-Hub --skill fea-structural -a claude-code`. Or copy the skill folder (Skill/abaqus/reference/fea-structural in Cai-aa/CAE-Agent-Hub) into .claude/skills/fea-structural in your project. Claude Code loads it when a task matches its description.

How do I install Fea Structural in Codex?

Run `npx skills add Cai-aa/CAE-Agent-Hub --skill fea-structural -a codex`. Or copy the skill folder (Skill/abaqus/reference/fea-structural in Cai-aa/CAE-Agent-Hub) into .agents/skills/fea-structural in your project. Codex loads it when a task matches its description.

Can I use Fea Structural in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Cai-aa/CAE-Agent-Hub --skill fea-structural -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fea-structural, .gemini/skills/fea-structural, .github/skills/fea-structural and .opencode/skills/fea-structural in your project.

What does Fea Structural need to run?

SKILL.md names no scripts, command-line tools or credentials: Fea Structural is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Write, Glob, Grep, Bash.

Does Fea Structural access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Fea Structural safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Fea Structural use?

Fea Structural is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Fea Structural use?

About 1.4k tokens (SKILL.md is roughly 5.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Fea Structural?

Skills that share tags, products or a category with Fea Structural: Astropy (zLanqing/codex-claude-academic-skills, 4.6k stars), Pymatgen (zLanqing/codex-claude-academic-skills, 4.6k stars), Cantera Ignition Delay (K-Dense-AI/scientific-agent-skills, 48k stars) and Weather (trpc-group/trpc-agent-go, 1.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Fea Structural?

Cai-aa (a GitHub user) maintains it in Cai-aa/CAE-Agent-Hub, which has 998 GitHub stars. The repository holds 57 skills in this directory. The repository was last updated on September 30, 2026.

Source: Cai-aa/CAE-Agent-Hub on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.