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ToolFusion / Bolted Joint / Engineering Tools

Project Tool: VDI 2230-compliant bolted joint verification

Specification & Integration Verification

F6 Composition for VDI 2230-compliant bolted joint verification

● Not Golden Verified ● Project Trust Verified Runnable: 0 / 3 steps
VERIFIED SCOPE
○ Compute clamped parts stiffness using VDI 2230 multi-cone model CALCULATION Manual Workflow
○ Compute fatigue safety factor using modified Goodman equation CALCULATION Manual Workflow
○ Compute fatigue utilization ratio PASS / FAIL capable Manual Workflow
⚠ This tool does not currently verify Preload_Uncertainty_Propagation, Stiffness_Ratio_Based_Load_Partitioning, Combined_Stress_Verification_VonMises, Embedment_And_Relaxation_Loss_Estimation, Modified_Goodman_Fatigue_Safety_Assessment, Multi_Mechanism_Joint_Integrity_Verification.
PROJECT INPUTS

Runnable deterministic steps: 0 / 3. Enter the project conditions used by this verification workflow. Prefilled values (16/16 inputs) are demonstration inputs, not recommended design values.

01Step 1: Compute clamped parts stiffness using VDI 2230 multi-cone...Manual Workflow
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To determine how external tensile load partitions between bolt and clamped parts (load ratio Φ), essential for operat...
02Step 2: Compute fatigue safety factor using modified Goodman equa...Manual Workflow
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MPa
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To ensure infinite life under cyclic loading by bounding operating stress state within fatigue envelope
03Step 3: Compute fatigue utilization ratioManual Workflow
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To express margin as a direct ratio of demand to capacity on the Goodman line

⚠ Runnable deterministic steps: 0 / 3. Steps marked "Input Required" or "Example Input Required" need user-provided engineering values before calculation.

ENGINEERING WORKFLOW GUIDE
This workflow contains no executable calculation steps. Review the engineering methods below.
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ENGINEERING EVIDENCE

Golden Coverage0 / 3
Project Trust11 / 11 PASS
RuntimeDeterministic
Components0 small tools, 3 steps

SCOPE & LIMITATIONS

NOT CURRENTLY VERIFIED
○ Preload_Uncertainty_Propagation
○ Stiffness_Ratio_Based_Load_Partitioning
○ Combined_Stress_Verification_VonMises
○ Embedment_And_Relaxation_Loss_Estimation
○ Modified_Goodman_Fatigue_Safety_Assessment
○ Multi_Mechanism_Joint_Integrity_Verification
These capabilities are outside the current verified workflow.

HOW THIS VERIFICATION WORKS

  1. Step 1: Compute clamped parts stiffness using VDI 2230 multi-cone model — engineering workflow step. Follow the documented method for manual execution.
  2. Step 2: Compute fatigue safety factor using modified Goodman equation — engineering workflow step. Follow the documented method for manual execution.
  3. Step 3: Compute fatigue utilization ratio — compares engineering inputs against deterministic thresholds and produces a PASS or FAIL decision.

This tool coordinates 1 validation step and 2 calculation steps. The overall engineering decision uses ALL_REQUIRED_VALIDATION_PASS aggregation: only validation steps contribute to the pass/fail outcome; calculation steps produce data only.

METHODS & EQUATIONS

All formulas are resolved from canonical runtime definitions and executed deterministically by the client-side engine.

Step 1: Compute clamped parts stiffness using VDI 2230 multi-cone model

Manual Workflow
Clamped parts stiffness c_p is calculated as the series sum of individual layer stiffnesses: for metallic layers, use the VDI 2230 conical compression zone formula c_i = (0.57735·E_i·π·t_i) / ln[(1.155·t_i + d_0)(d_w − d_0) / (0.57735·t_i·(d_w + d_0))]; for gasket (uniform compression), use c_g = E_g·A_g / t_g where A_g = π·((d_w − d_0)/2)².

Step 2: Compute fatigue safety factor using modified Goodman equation

Manual Workflow
S_F,fatigue = 1 / (σ_a / σ_D + σ_m / R_m) per VDI 2230-1 Eq. 7-4. This is the reciprocal of the fatigue utilization ratio.

Step 3: Compute fatigue utilization ratio

Manual Workflow
U_fatigue = σ_a / σ_D + σ_m / R_m per VDI 2230-1 Eq. 7-3. Compliance requires U_fatigue < 1.0.

UNDERSTANDING THE RESULTS

PASS
A proven validation criterion passed. The engineering input satisfies the deterministic threshold.
FAIL
A proven validation criterion failed. The engineering input does not satisfy the deterministic threshold.
CALCULATED
A deterministic calculation completed, but no acceptance criterion exists for this step. CALCULATED does NOT mean PASS.
RESULT NOT VALID
Runtime executed but engineering validity requirements were not met.
INCOMPLETE
Required inputs or workflow steps are incomplete.

The overall decision reflects only validation steps. Calculation steps produce numerical results without pass/fail claims.

WHEN TO USE THIS TOOL

  • When deterministic Bolted Joint engineering verification is needed for project-specific conditions.
  • For calculation of Compute clamped parts stiffness using VDI 2230 multi-cone model (Step 1).
  • For calculation of Compute fatigue safety factor using modified Goodman equation (Step 2).
  • For validation of Compute fatigue utilization ratio (Step 3).
  • For deterministic pre-checks before formal engineering review or submission.

When NOT to use this tool: This tool does not replace laboratory testing, formal engineering analysis by a licensed professional, or code-compliance certification. It performs deterministic threshold comparison and calculation only.

ENGINEERING FAQ

What does this verification tool check?

This tool performs 3 deterministic engineering steps: (1) Compute clamped parts stiffness using VDI 2230 multi-cone model, (2) Compute fatigue safety factor using modified Goodman equation, (3) Compute fatigue utilization ratio.

What does a PASS result mean?

A PASS result means the validation step's deterministic threshold comparison was satisfied. It does not constitute laboratory certification or code compliance.

What does a CALCULATED result mean?

A CALCULATED result means the deterministic calculation completed, but no acceptance criterion is applied to this step. CALCULATED does NOT mean PASS.

What is not currently verified by this workflow?

Capabilities not currently verified include: Preload_Uncertainty_Propagation, Stiffness_Ratio_Based_Load_Partitioning, Combined_Stress_Verification_VonMises, Embedment_And_Relaxation_Loss_Estimation, Modified_Goodman_Fatigue_Safety_Assessment.

How many steps are golden verified?

0 out of 3 steps have been verified with deterministic golden test cases.

COMPONENT TOOLS

This workflow currently contains no bound executable Small Tools. Steps are defined by engineering methods and reference materials.

CalculationWorkflow StepDetermine clamped parts stiffness using multi-layer conical compression zone model
CalculationWorkflow StepCompute fatigue stress ratio and safety factor using modified Goodman diagram
ValidationWorkflow StepCompute fatigue stress ratio and safety factor using modified Goodman diagram

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