--- name: fea-structural-8118e74201ce 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 domain: science category: structural-analysis priority: high phase: 1 tools-libraries: - ANSYS Mechanical - Abaqus - MSC NASTRAN - HyperMesh - Femap graph: domains: [domain:mechanical-engineering] skillAreas: [skill-area:physics-simulation, skill-area:mathematical-reasoning, skill-area:motion-planning] roles: [role:systems-integration-engineer, role:research-engineer] --- # 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 Type | Recommended Elements | |---------------|---------------------| | Static stress | Hex20, Tet10, Quad8 | | Thin structures | Shell (QUAD4/8, TRIA3/6) | | Beam structures | BEAM/BAR elements | | Contact | Linear elements preferred | | Nonlinear | Reduced 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 #### 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 --- Source attribution: a5c-ai Original project: https://github.com/a5c-ai/babysitter License: MIT License information: https://opensource.org/license/mit Original upstream instructions; downloaded from Mega AI Hub. ## Upstream license notice MIT License Copyright (c) 2026 Gabriel Moreira Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # Mega AI Hub resource metadata Creator / publisher: a5c-ai Original project: https://github.com/a5c-ai/babysitter Attribution basis: Upstream repository explicitly recorded in package mirror path Fields of work: Data & Analytics, Development & Engineering, Education & Research, Product Management, Project & Program Management Roles: Data Scientist, ML / AI Engineer, Product Manager, Project Manager, Researcher Specialties: Specialty not specified Tools: Abaqus, Femap, Hypermesh, Msc Nastran, Ansys Mechanical Country applicability: Country not specified Classification basis: Source catalog labels Instruction SHA-256: 9c447f21e574a51d7a24adafe0810a9278b4554191f2cd8b28d9818a56c25cb0