Static stress simulations in Autodesk Fusion uses Finite Element Analysis (FEA) to evaluate stress, displacement, and safety factors for parts and assemblies under applied loads before manufacturing.

Elevate your design and manufacturing processes with Autodesk Fusion

Get a 30-Day Free Trial See Plans and Pricing

Static stress simulations in Autodesk Fusion enables engineers and designers to predict how parts will behave under real-world loads before manufacturing. Using finite element analysis (FEA), you can test both single components and complex assemblies, examining displacement, stress distribution, and potential failure points. This comprehensive guide walks you through the complete workflow, from setup to results interpretation.

Getting started with static stress simulations

To begin a static stress simulation, switch from the Design workspace to the Simulation workspace using the dropdown menu. Select “Static Stress” as your study type to create a new study. While you can configure settings immediately, it’s often easier to adjust these as you progress through the setup.

Simplifying your model

Before running a simulation, you need to isolate the components you want to analyze. This is a critical step that many users overlook.

Important distinction: Toggling component visibility doesn’t remove parts from your study. You must use the Simplify tool to properly exclude components.

Two methods for component selection

Method 1: Click on unwanted components and remove them individually.

Method 2: Select only the components you want to include, right-click, and choose “Remove All Except Selected Components.”

When selecting components, ensure your selection filter is set to “Component Priority” for easier picking. Use the Control key to select multiple components simultaneously.

Assigning materials for static stress simulations

Material selection directly impacts your simulation accuracy. Fusion automatically pulls materials from your design workspace, but you can override these for testing purposes.

Material considerations

Fusion will display a yellow warning triangle next to materials unsuitable for static stress analysis. These are typically anisotropic materials like wood, which have different properties along different axes. For these materials, consider alternative study types.

Safety factor settings

When reviewing material properties, you can choose between two testing thresholds:

• Yield strength: The point at which material deforms permanently beyond its elastic limit
• Ultimate tensile strength: The maximum load the part can withstand before failure

Defining constraints for static stress simulations

Constraints define which parts of your model remain stationary during calculations. Fusion offers several constraint types:

• Fixed
• Pin
• Frictionless
• Prescribed displacement
• Remote

For a typical setup, apply fixed constraints to mounting points or surfaces that won’t move in real-world conditions. Constraints can be set to restrict movement in all axes or specific directions.

Editing tip: Access constraints either by clicking symbols in the viewport or through the browser tree under the Constraints folder.

Applying structural loads to your static stress simulations

Loads represent the forces acting on your component. To add a load, select the face or feature where force will be applied, then configure the direction and magnitude.

Load configuration options

You can define load direction by:

• Using grab handles to rotate visually
• Entering specific angle values
• Setting normal direction
• Defining via vector

Available load types

• Force
• Pressure
• Moment
• Bearing load
• Remote force
• Hydrostatic pressure
• Remote moment

Set the magnitude in your preferred units. You can customize default units through document settings for consistency across studies.

Verifying degrees of freedom

Before solving, check that all components are properly constrained. Access Display Settings and enable “Degrees of Freedom” visualization. All components should show as fully constrained. Different colors indicate unconstrained elements that need attention.

Managing contact conditions

When simulating assemblies with multiple components, contact conditions define how bodies interact under load. Without proper contacts, components could unrealistically pass through each other.

Automatic vs. manual contacts

Fusion can generate contacts automatically with a specified detection tolerance. Automatic contacts create bonded relationships by default, meaning components act as permanently joined.

Contact types

• Bonded: Components are permanently fixed together and cannot separate.
• Separation: Components experience friction during movement but can separate if deformation is sufficient. This is the most commonly used contact type for realistic simulations.
• Symmetric: Used for specific geometric conditions.

Adjust contact types through the Manage Contacts dialog to match real-world behavior.

Setting safety factor thresholds

Define upper and lower safety factor targets before solving. These thresholds guide result interpretation and help identify whether designs are overbuilt, adequate, or insufficient. Common ranges are 2 to 4, though this varies by application and industry standards.

Understanding mesh settings

The mesh represents calculation points throughout your model. Finer meshes provide more accurate results but require longer solve times.

Viewing and adjusting mesh

Switch from Model View to Mesh View to inspect your mesh. If the default settings seem inadequate, access mesh settings to adjust:

• Model-based size
• Absolute size
• Advanced refinement options

Focus finer mesh settings on areas of high stress concentration or geometric complexity.

Pre-check validation for static stress simulations

Always run the pre-check before solving. This tool identifies missing elements like:

• Undefined constraints
• Missing loads
• Material assignment errors
• Contact definition issues

The pre-check provides clickable prompts that take you directly to problem areas for quick resolution.

Solving your static stress simulations

Fusion offers cloud solving for simulations, which provides significant workflow advantages. With Fusion for Design or the Fusion Simulation Extension (if you’re an existing Fusion subscriber), you can:

• Solve studies without tying up local computing resources
• Continue working in other workspaces while solving
• Set up additional studies simultaneously

Monitor solve progress through the Job Status bar accessible from the top toolbar.

Cloning studies for comparison

To test multiple scenarios efficiently, clone existing studies. This duplicates all setup parameters, allowing you to modify only specific variables like material selection or load magnitude. This approach is ideal for comparative analysis and optimization.

Interpreting guided results

Once solving completes, you’ll receive a notification. The Results section opens with the Safety Factor view, showing guided study results against your predefined thresholds.

Three result categories

Very strong: Minimum safety factor significantly exceeds targets. This suggests opportunities to reduce material volume and cost.

Meets safety factor target: Design falls within acceptable range. Verify that loads are realistic and properly scaled.

Not strong enough: Design fails to meet minimum safety factor. Red areas indicate critical stress concentrations requiring design modifications.

You can filter the display by deselecting “In Range” or “Not in Range” to focus on specific areas of concern.

Advanced mesh refinement

For designs near safety factor boundaries, adaptive mesh refinement provides higher accuracy. Access this through Manage > Adaptive Mesh Refinement with options ranging from low to high refinement levels.

Adaptive mesh refinement performs multiple solve iterations with progressively finer meshes until results converge. This process takes longer but provides confidence in result accuracy.

Convergence plots

Studies with adaptive mesh refinement unlock 2D convergence plots showing how results stabilized across iterations. View convergence for:

• Von Mises stress
• Displacement
• First principle stress
• Third principle stress

Detailed results analysis for static stress simulations

Beyond guided results, the Results tab provides comprehensive data visualization options:

• Safety factor
• Stress (Von Mises, principle stresses)
• Displacement
• Reaction force
• Strain
• Contact pressure
• Contact force

Animation controls

Animate results to visualize how stress and displacement develop throughout the loading sequence. The bottom control bar allows you to step through the analysis and observe dynamic behavior.

Deformation scale

Results display with an adjusted deformation scale by default, exaggerating movement for visibility. Switch to actual deformation scale to see true displacement magnitudes. This distinction is crucial when displacement values appear small but visual deformation looks extreme.

Range adjustment

Use the color bar sliders to focus on specific value ranges. This helps isolate areas of maximum stress or displacement for detailed examination.

Inspection tools

Fusion provides several inspection tools for detailed result interrogation:

Probes:

• Minimum and maximum point probes automatically identify extreme values
• Point probes query specific locations
• Surface probes allow continuous exploration across surfaces

Cutting planes: Create section or slice views to examine internal stress distribution. Options include:

• Section view (shows one side with internal detail)
• Slice view (shows only the cutting plane)
• Mesh or vector visualization overlays

Cutting planes are particularly valuable for identifying stress concentrations hidden within solid geometry.

Additional tools:

• Center of mass display
• Reaction force visualization

Generating reports for statis stress simulations

Fusion automatically generates comprehensive simulation reports accessible through your browser. Reports include:

• Study setup parameters
• Material properties
• Load cases and boundary conditions
• Guided results with recommendations
• Detailed stress and displacement data

These reports are shareable with team members and stakeholders, facilitating collaboration and design review processes.

Best practices for accurate static stress simulations

Start simple: Begin with simplified geometry and basic loads before adding complexity.

Verify constraints: Always check degrees of freedom to ensure proper constraint application.

Material selection: Use materials with complete property data appropriate for static analysis.

Mesh sensitivity: For critical designs, perform mesh refinement studies to verify result convergence.

Reality check: Compare displacement and stress magnitudes against engineering intuition and hand calculations.

Document assumptions: Use reports to record load assumptions, material choices, and constraint rationale.

Common pitfalls to avoid

Forgetting to simplify the model properly, leaving unnecessary components that increase solve time and complexity.

Relying solely on visual deformation without checking actual displacement values.

Ignoring yellow material warnings, which can produce meaningless results.

Applying loads without verifying direction and magnitude units.

Skipping the pre-check validation step.

Design with confidence: Static stress simulations in Autodesk Fusion help You predict, optimize, and perform

Static stress simulations in Autodesk Fusion provides powerful capabilities for validating designs before manufacturing. By following this systematic workflow from model simplification through results interpretation, you can confidently predict part performance, optimize material usage, and identify potential failure modes. The combination of guided results, detailed analysis tools, and comprehensive reporting makes Fusion an accessible yet powerful platform for engineering analysis.

Whether you’re evaluating a single component or a complex assembly, mastering these simulation techniques will enhance your design process, reduce physical prototyping costs, and ultimately lead to better-performing products.