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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This method is widely used as a key design criteria for engine and powertrain components like crankshafts, camshafts and pistons. Vibration Manager Enables vibration specification data to be entered, edited, and viewed. Stress gradient corrections FKM Guidelines User defined Critical distance Enables vibration specification data to be entered, edited, and viewed.
Biaxial 3D Multiaxial Auto-correction.
Material inputs are standard mean stress corrections or user-specified Haigh diagrams to assess durability. Multiple threads can also be used to speed up the translation phase of the analysis by splitting the translation into multiple processes.
Animating displacements from FE results or animation files display structural deformation under load. Distributed Processing enables a DesignLife analysis running in batch mode to be distributed across multiple computers or nodes of a computer cluster. Manufacturing effects can be accounted for by using equivalent plastic strain in the unloaded component.
Includes a batch interface program to simplify the running of distributed jobs. 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 containing over vibration entries is included.
Want to learn more? Although this is primarily a CAE based analysis, the same method may also be applied to measured stress data. Rather than limiting this evaluation to a small number of load cases or steps, stresses can be assessed by using the chosen failure criteria throughout realistic duty cycles quasi-static or dynamic. Fatigue Analysis using FEA Results Design for Durability Attendees looking to ncpde more about the background of fatigue theory are encouraged to attend our 2-day course called Practical Fatigue Theory.
A standard database with fatigue properties for many commonly used materials is included. DesignLife provides methods to intelligently identify weld lines in the FE model, thus simplifying the process of setting up a fatigue job. 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 designlofe to undergo during operation.
The Composite Analysis option allows users to evaluate the strength of a structure against industry standard composite failure criteria. 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 desitnlife joints. Material models can also be defined using general look-up curves. Since the fatigue calculation at each model location is effectively independent, the benefit to adding additional processing threads is very scalable.
Select from a pre-populated library of geometries or supply custom stress intensity factors.
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 desgnlife 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.
Dang Van is a multi-axial fatigue limit criterion and is a method of predicting the endurance limit under complex loading situations.
Simulate complex loading scenarios using any time domain method static or modal superposition, duty cycles, etc. Designlifs include components that are both mechanically and thermally loaded such as vehicle exhaust systems and manifolds. The following methods can be used individually or combined to give the most conservative result: Short Fibre Composite module features: Find training Request quote Contact us.
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. Download the latest version. Simulate vibration tests driven by random Dsignlifeswept 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.
This enables the ability to interpolate multiple material data curves for factors such as mean stress or temperature. Inputs are linear stress or strain for this SN based technique. The Adhesive Bonds option enables durability calculations on adhesive joints in metallic structures.
Time histories due to applied loads can be extracted for direct correlation with your measured strain or displacement data.
The same structural stress technique used for seam welds qnsys used in WholeLife to determine the structural bending and membrane stresses at the weld. 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.
Fatigue analysis process Once created, the fatigue process can be captured and reused. Commercial truck owners needing weight and fuel economy savings are considering the designlif of a single wide-base wheel.
The primary application of the Stress-Life SN method is high-cycle fatigue long lives where nominal stress controls the fatigue life. Engineers without fatigue expertise can evaluate modified product designs to determine the updated product life.
Start-to-end automation avoids the majority of errors and ensures consistency, especially in large organizations in which multiple engineers might be analyzing the results. The stress tensor for each layer and section integration point through the thickness is read by DesignLife from FE results. Biaxial 3D Multiaxial Tuutorials Mean stress corrections: The Short Fibre Composite option uses stress-life fatigue calculations for anisotropic materials such as glass fibre filled thermoplastics.
The Strain Gauge Positioning option calculates the optimum position and number of gauges required to enable the subsequent reconstruction of applied load histories.
Safety Factor enables the calculation of stress based factors of safety. Ncodee vibration specification data to be entered, edited, and viewed. 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.