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Ansys nCode DesignLife
Stress & Strain Based Fatigue Life Prediction
Optimize Product Fatigue Life for Expected Use Scenarios
- Unparalleled Accuracy and Technology
- Simulation-Led Design to Reduce Reliance on Physical Test
- Reduce Overall Product Development & Validation Cost
- Flexible and Easy-to-Use User Interface
Features
Quick Specs
Ansys partnered with HBK to bring unparalleled simulation-based durability technology to Ansys Workbench, providing end-to-end solutions for customers finding fatigue failure a key challenge.
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Stress life (SN)
Thermal Mechanical Fatigue
Material Management
FEA Display
Strain life (EN)
Seam Welds
Vibration Manager
Crack growth
Vibration and fatigue
Spot Welds
Virtual Strain Gauge and Virtual Sensor
Customization
Capabilities
Understand and Simulate Fatigue Early in the Design Process
Capabilities
Key Features
The new user interface provides an end-to-end solution within an integrated workflow and single interface
- Strain Life (EN)
- Stress Life (EN)
- Dang Van
- Safety Factor
- Seam Weld
- Spot Weld
- Vibration Fatigue
- Thermo-Mechanical Fatigue
- Adhesives Bonds
Strain Life (EN)

Strain-Life is applicable to a wide range of problems, including low-cycle fatigue (LCF) where the local elastic-plastic strain controls the fatigue life.
The standard EN method uses the Coffin-Manson-Basquin formula, defining the relationship between strain amplitude and the number of cycles to failure.
Stress Life (SN)

This is primarily applicable to high-cycle fatigue (HCF) where nominal stress controls the fatigue life.
A wide range of methods are provided for defining the SN curves, including the ability to interpolate multiple material data curves for factors such as mean stress or temperature. Further options are also provided to account for stress gradients and surface finishes.
Dang Van

Multiaxial fatigue limit criterion is used to predict the endurance limit under complex loading situations.
Output is the safety factor. The program uses material parameters calculated from tensile and torsion tests. Account for manufacturing effects by using equivalent plastic strain in the unloaded component.
Safety Factor

Evaluate stress-based factors of safety and standard mean stress corrections or user-specified Haigh diagrams to assess durability.
This is widely used as a key design criterion for engine and powertrain components.
Seam Weld

Simplifies the process of setting up fatigue analysis of seam welds by intelligently identifying weld lines in the FEA Model.
Covers seam welded joints including fillet, overlap and laser welded joints. Stresses can either be taken directly from FEA models (shell or solid elements) or calculated from grid point forces or displacements at the weld. The approach is appropriate for weld toe, root and throat failures.
Spot Weld

Enables fatigue analysis of spot welds in thin sheets. Cross sectional forces and moments are used to calculate structural stress around the edge of the weld.
Life calculations are made around a spot weld at multiple angle increments and the total life reported includes the worst case. Python scripting enables modeling of other joining methods such as rivets or bolts.
Vibration Fatigue

The Vibration Fatigue option enables the simulation of vibration shaker tests driven by random (PSD), swept-sine, sine-dwell or sine-on-random loading.
It provides the capability to predict fatigue in the frequency domain and is more realistic and efficient than time-domain analysis for many applications with random loading, such as wind and wave loads.
Thermo-Mechanical Fatigue

Components in high-temperature operating environments such as engine pistons, exhaust systems and manifolds can suffer from complex failure modes.
The Thermo-Mechanical Fatigue (TMF) option provides solvers for high-temperature fatigue and creep by using stress and temperature results from finite element simulations. TMF includes high temperature fatigue methods Chaboche and Chaboche Transient. Creep analysis methods include Larson-Miller and Chaboche creep.
Adhesive Bonds

Enables fracture-mechanics-based method to assess which joints in the structure are most critically loaded.
The adhesive bonds option enables durability calculations on adhesive joints in metallic structures. Adhesive bonds are modeled with beam elements and grid point forces are used to determine line forces and moments at the edge of the glued flange. Approximate calculations of the strain energy release rate are made at the edge of the adhesive and, by comparison to the crack growth threshold, a safety factor is calculated.
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Join us on Saturday, June 10th, 2023, at 3 PM. The event will take place at Riverside Park, 123 River Lane, Springfield.
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Join us on Saturday, June 10th, 2023, at 3 PM. The event will take place at Riverside Park, 123 River Lane, Springfield.
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Summit 2025
Join us on Saturday, June 10th, 2023, at 3 PM. The event will take place at Riverside Park, 123 River Lane, Springfield.

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