nCode DesignLife is an up-front design tool that identifies critical locations for performing fatigue analysis from leading FEA results data, including ANSYS. Workshop / Tutorial 1: Introduction to the ANSYS nCode DesignLife Interface Workshop / Tutorial 2: Constant amplitude Stress life fatigue analysis. Workshop .
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DesignLife provides methods to intelligently identify weld lines in the FE model, thus simplifying the process of setting up a fatigue job. Simulate complex loading scenarios using any time domain method static or modal superposition, duty cycles, etc.
The Strain Gauge Positioning option calculates the optimum position and number of gauges required to enable the subsequent reconstruction of applied load histories. Stress gradient corrections FKM Guidelines User defined Tutoria,s distance Enables vibration specification data to be entered, edited, and viewed. Structural stress at the weld toe, the hot-spot stress can be estimated by the extrapolation of the surface stress at points near the weld Supports BS welding standard, together with required material curves Enables vibration specification data to be entered, edited, and viewed.
The theoretical basis of the method was developed by the Volvo Group designlifw the testing and software implementation was carried out as part of a collaborative research project with partners including Jaguar Land Rover, Coventry University and Nasys University.
The Short Fibre Composite option uses stress-life fatigue calculations for anisotropic materials such as glass fibre filled thermoplastics. Want to learn more? Enables vibration specification data to be entered, edited, and viewed.
Mechanical loads that vary at a different rate to the temperature variations can also be combined. A standard database containing over vibration entries is included.
Introduction to ANSYS nCode DesignLife
This method is widely used as a key design criteria for engine and powertrain components like crankshafts, camshafts and pistons. A standard database with fatigue properties for many commonly used materials is included. Safety Factor enables the calculation of stress based factors of safety. The Strain-Life method is applicable to a wide range of problems including low-cycle fatigue with the local elastic-plastic strain controls the fatigue life.
This allows critical locations, load combinations and associated design reserve factors to be readily identified.
The Seam Weld option enables the fatigue analysis of seam welded joints including fillet, overlap, and laser welded joints. Material models can also be defined nocde general look-up curves.
Based on the results of the finite element analysis, fatigue life estimation and durability testing, the new utility vehicle frame design was released for production.
Commercial truck owners needing weight and fuel economy savings are considering the benefits of a single wide-base wheel. Product options containing functions for virtual shaker testing, fatigue of welds, vibration fatigue, crack growth detection, fatigue of composites, thermo-mechanical fatigue analysis and more are described below.
The Thermo-Mechanical Fatigue TMF option provides solvers for high temperature fatigue and creep by using stress and temperature results from finite element simulations. Further options are also provided to account for stress gradients and surface finishes. Material inputs are standard mean stress corrections or user-specified Haigh diagrams to assess durability. Desjgnlife stress tensor for each layer and section tutoriala point through the thickness is read by DesignLife from FE results.
Although this is primarily a CAE based analysis, the same method may also be applied to measured stress data. High temperature fatigue methods: Fatigue Analysis using FEA Results Design for Durability Attendees looking to learn more about the background of fatigue theory are encouraged to attend our 2-day course called Practical Fatigue Theory.
Vibration Manager Enables vibration specification data to be entered, edited, and viewed. Crack Growth Provides a complete fracture mechanics capability using industry standard methodologies for specified locations on an FE model. See how our customers are using our software: Includes new optimised and spot weld methods. ANSYS nCode DesignLife contains the most up-to-date methods and simulation tools to make predicting fatigue life as accurate and easy as possible.
Distributed Processing enables a DesignLife analysis running in batch mode to be distributed across multiple computers or nodes of a computer cluster.
Since the fatigue calculation at each model location is effectively independent, the benefit to adding additional processing threads is very scalable. It uses an integrated approach for modeling fatigue over the entire lifetime of a component – from the very early stages to final fracture – to give more accurate determination of weld lives particularly for complex geometries.
Enables you ncoee rapidly solve jobs by using the combined processors of many machines.
Introduction to ANSYS nCode DesignLife – FEA, CFD and Explicit Dynamics
Engineers without fatigue expertise can evaluate modified product designs to determine the updated product life. Download the latest version. Simulate vibration tests driven by random PSDswept sine, sine dwell or sine-on-random loading Predict damage and life per layer and integration point Incorporate results of manufacturing simulation including fibre orientation tensors or residual stresses Model local fatigue properties based on microstructure orientation tensor and stress state Calculate fatigue based on principal stresses or critical plane — including stresses calculated from FE-Digimat and multiaxial stress states Choice of fatigue property model – SN curve interpolation or interface to Digimat Use of homogenized matrix or fibre stresses as well as typical composite ones.
The Adhesive Bonds option enables durability calculations on adhesive joints in metallic structures.
The following courses feature hands-on examples with DesignLife: Find training Request quote Contact us. The primary application of the Stress-Life SN method is high-cycle fatigue long lives where nominal stress controls the fatigue life. The Composite Analysis option allows users to evaluate the strength of a structure against industry standard composite failure criteria.
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. This feature makes it easy to create a composite duty cycle with repeats. Includes the ability to interpolate multiple material data curves for factors such as mean stress or temperature.
Multiple threads can also be used to speed up the translation phase of the analysis by splitting the translation into multiple processes. Manufacturing effects can be accounted for by using equivalent plastic strain in the unloaded component. Select from a pre-populated library of geometries or supply custom stress intensity factors. The method is based on the approach developed by Volvo see also SAE paper and validated through years of use on vehicle chassis and body development projects.
Biaxial 3D Multiaxial Auto-correction Mean stress corrections: Python scripting is also available for defining custom fatigue methods and material models.