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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Download the latest version. 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 method is widely used as a key design criteria for engine and powertrain components like crankshafts, camshafts and pistons. Time histories due to applied loads can be extracted for direct correlation with your measured strain or displacement data.
Material inputs are standard mean stress corrections or user-specified Haigh diagrams to assess durability. Simulate complex loading scenarios using any time domain method static or modal superposition, duty cycles, etc. 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.
Fatigue analysis process Once created, the fatigue process can be captured and reused. Further options are also provided to account for stress gradients and surface finishes.
nCode DesignLife – CAE Fatigue Analysis Software – nCode
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. The Seam Weld option enables the fatigue analysis of seam welded joints including fillet, overlap, and laser welded joints. Uses specific material parameters calculated from tensile and tutoriale tests.
This enables the ability to interpolate multiple material data curves for factors such as mean stress or temperature. DesignLife provides methods to intelligently identify weld lines in the FE model, thus simplifying the process of setting up a fatigue job.
Vibration Manager Enables vibration specification data to be entered, edited, and viewed. The Strain Gauge Positioning option calculates the optimum position and number of gauges required to enable the subsequent reconstruction of applied load histories.
Based on the results of the finite element analysis, fatigue life estimation and durability testing, the new tutoriqls 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.
Biaxial 3D Multiaxial Auto-correction. The following methods can be used individually or dezignlife to give the most conservative result: ANSYS nCode DesignLife contains the most up-to-date methods and simulation tools to make predicting fatigue life as accurate and easy as possible. A standard database with fatigue properties for many commonly used materials is included. Product options containing functions for virtual xesignlife testing, fatigue of welds, vibration fatigue, crack growth detection, fatigue of composites, thermo-mechanical fatigue analysis and more are described below.
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. Engineers without fatigue expertise can evaluate modified product designs to determine the updated product life.
ANSYS nCode DesignLife
Stress gradient corrections FKM Guidelines User defined Critical distance Enables vibration specification data to be entered, edited, and viewed. Select from a pre-populated library of geometries or supply custom stress intensity factors. Mechanical loads that vary at a different rate to the temperature variations can also be combined.
High temperature fatigue methods: This allows critical locations, load combinations and ansyz design reserve factors to be readily identified. 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. This approach substantially reduced ansts costs and helped E-Z-GO get the new design into production faster.
Includes new optimised and spot weld methods. A standard database containing over vibration entries is included.
Includes the ability to interpolate ttuorials material data curves for factors such as mean stress or temperature. The Short Fibre Composite option uses stress-life fatigue calculations for anisotropic materials such as glass fibre filled thermoplastics.
The primary application of the Stress-Life SN method is high-cycle fatigue long lives where nominal stress controls the fatigue life. Manufacturing effects can be accounted for by using equivalent plastic strain in the unloaded component. 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.
The theoretical basis of the method was developed by the Volvo Group and the testing and software implementation was carried out as part of a collaborative research project with partners including Jaguar Land Rover, Coventry University and Warwick University. They then ran the thermal-stress analysis again with the new design, exported the stresses to nCode DesignLife, and combined the results with a material model and a description of the repetitive loading that the product is expected to undergo during operation.
Duty cycles can be defined by selecting from and building multiple cases. Applications include components that are both mechanically and thermally loaded such as vehicle exhaust systems and manifolds.
The Thermo-Mechanical Fatigue TMF option provides solvers for high temperature fatigue and creep by using stress and temperature results from finite element simulations. Material models can also be defined using general look-up curves. Distributed Processing enables a DesignLife analysis running in batch mode to be distributed across multiple computers or nodes of a computer cluster. Safety Factor enables the calculation of designliife based factors of safety.
The following courses feature hands-on examples with DesignLife: