Calculating fatigue lives has historically been a complex and challenging task, particularly in predicting fatigue life and failure locations for welded joints and structures, including spot welds, which often show poor correlation with test data. The Verity Structural Stress Method, developed and patented by Battelle, represents a significant advancement in fatigue analysis for welded joints derived from finite element models. Integrated into fe-safe, Verity combines its fatigue analysis capabilities for welded structures with the advanced features of fe-safe for finite element models, enabling companies to reduce or eliminate the costs associated with testing design integrity and avoid the common practice of over-engineering driven by uncertainties in fatigue life.
Verity™ At a Glance
- Eliminates subjective decisions, enhancing reliability and accuracy.
- Operates with nodal forces at weld lines for coarse meshes.
- Uses a single master S-N curve for all welds and thicknesses.
- Validated by Battelle’s Joint Industry Project with over 3,500 fatigue tests.
- Provides consistent structural stress calculations across mesh densities.
- Applicable to all weld types and loading conditions, including random vibration.
Capabilities
- No subjective user decisions required.
- Compatible with coarse meshes of solid or shell elements.
- Users can create custom master S-N curves from proprietary data.
- “Auto-Detect” tool identifies welded sheet counts and spot welds quickly.
- A single master S-N curve applies to all weld types and loading conditions.
- Supported by Altair, ANSYS, and BETA CAE Systems for easy weld definitions.
- Minimizes mesh density sensitivity with nodal forces for consistent stress in Six Sigma CAE applications.
Benefits
- Optimizes designs to reduce over-engineering.
- Eliminates subjective decisions for enhanced reliability and accuracy.
- Analyzes welded and non-welded areas in one run, speeding up analysis.
- Significantly reduces CAE and FEA modeling time and development costs.
- Minimizes physical validation testing and regulatory compliance costs.
- Interfaces with leading FEA suites via a user-friendly GUI, with an “Auto-Detect” tool for quick setup.
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References
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