Structural Analysis
Professor, I keep hearing that structural analysis is the most fundamental CAE discipline. But what exactly does it involve?
Put simply, it's about predicting how a structure behaves when forces are applied — how much it deforms, where stress concentrates, and whether it might fail. Think about a car door: will it dent if someone leans against it? Or a bridge: how much will it deflect when a truck crosses? All of those questions are answered numerically with structural analysis.
So we can prove a design won't break before we even build a prototype?
Exactly — and without ever building a physical part. This category covers 1, on structural analysis from fundamentals to advanced practice. Start with the Linear Static Analysis entry below.
Introduction to Structural Analysis (FEA/FEM)
Structural Analysis — also called Finite Element Analysis (FEA) or the Finite Element Method (FEM) — is the most widely used CAE discipline. It predicts the mechanical response (displacement, stress, strain) of solid structures subjected to loads. It is essential for structural integrity verification and lightweight design across automotive, aerospace, civil, and consumer product industries.
What Structural Analysis Can Solve
- Strength assessment: Verify that stresses under applied loads don't exceed material allowable values
- Stiffness: Ensure deformations meet functional tolerances (clearance, positional accuracy)
- Vibration characteristics: Identify natural frequencies and mode shapes, guide resonance avoidance design
- Fatigue life: Predict time-to-failure under cyclic loading using S-N curves and damage accumulation
- Buckling: Detect instability in thin-walled structures and slender columns before it occurs
- Impact & drop: Evaluate structural safety under high-speed dynamic events (crash tests, drop tests)
Standard Analysis Workflow
- CAD geometry preparation: Simplification (defeaturing), symmetry exploitation, assembly cleanup
- Mesh generation: Element type selection (tet/hex), mesh density control, quality metrics
- Material properties: Young's modulus, Poisson's ratio, yield stress, density, fatigue curves
- Boundary conditions: Constraints (fixed, pinned) and loads (forces, pressure, thermal, acceleration)
- Solve: Matrix assembly and direct/iterative solver execution
- Post-processing: Contour plots of displacement/stress, comparison with analytical solutions or test data
Beginners are recommended to start with Linear Static Analysis — the most fundamental type, assuming small deformation, linear elasticity, and static loading.
Learning Roadmap
| Level | Topics | Recommended Path |
|---|---|---|
| Beginner | Linear static FEA fundamentals, mesh generation, boundary conditions | Linear Static → Beam Theory → Axisymmetric Analysis |
| Intermediate | Material nonlinearity, contact analysis, modal and transient dynamics | Elastoplasticity → Contact → Modal Analysis |
| Advanced | Geometric nonlinearity, fracture mechanics, fatigue, topology optimization | Large Deformation → J-integral → Fatigue → Topology Opt. |
Browse Subcategories
Not sure where to start? Begin with Linear Static Analysis (marked START).