ugm ncode 2011 - ansys · pdf fileansys ncode designlife standard base package including...

© 2011 ANSYS, Inc. October 12, 20111

ANSYS nCode DesignLife™

Hari SubramaniamANSYS, Inc.


Why are we here?

What is Fatigue? ‐ Definition and Importance

What is ANSYS nCode DesignLife?– Product Features– Capabilities– Benefits

ANSYS nCode DesignLife Product Packaging!

Frequently Asked Questions (FAQs)

ANSYS® nCode DesignLife™ Agenda


ANSYS® nCode DesignLife™Why we are here?

“How long will it last?“

“Will it survive the test?”


Workbench 2.0 Integration

nCode OEM Partnership

Material libraryIntegration with TestProcess OrientationAdvanced Duty CyclesEase of Use

ANSYS® nCode DesignLife™Why we are here?



What is Fatigue?


Fatigue is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading.

ANSYS® nCode DesignLife™What is fatigue?


Fatigue is:

Failure under a repeated or otherwise varying load which never reaches a level sufficient to cause failure in a single application.

The nominal maximum stress values are less than the ultimate tensile stress limit, and may be below the yield stress limit of the material.

The initiation and growth of a crack, or growth from a pre‐existing defect, until it reaches a critical size.

ANSYS® nCode DesignLife™What is fatigue?

Catastrophic failure of pressurized fuselage causes total structural collapse

de Havilland Comet


ANSYS nCodeDesignLife™

What is the Product?


Materials

Stresses

Loads

Mechanical

Engineering Data

DesignLife

ANSYS® nCode DesignLifeWhat is the Product?

ANSYS™ Workbench®


ANSYS® nCode DesignLife™What is the Product? ‐ Features

Streamlining the Virtual Engineering Process

– Powerful Fatigue Analysis Technology

– Integrated Reporting and Process Encapsulation

– Fast, Expandable, and Scalable


Intuitive and easy to use software for performing fatigue analysis of finite element models.

Efficiently analyze large finite element models and complete usage schedules.

Wide range of fatigue analysis capabilities including stress‐life, strain‐life, multi‐axial, weld analysis, virtual shaker table, and more.

Single environment for both Test and CAE data.

Extensive material database

ANSYS® nCode DesignLife™What is the Product? ‐ Features


Stress‐Life (single, multi‐curve, Haigh diagrams)

Strain‐Life (automated multi‐axial corrections)

Multi‐axial safety factor (Dang Van)

Seam welds and spot welds

High temperature fatigue

Vibration fatigue (shaker simulation)

Multiple runs in a single analysis

Complete duty cycles / flight spectrums

Multi‐processor enabled for fast results

Use Python for proprietary or custom methods

ANSYS® nCode DesignLife™What is the Product? ‐ Capabilities

Finite Element results supported– Static (linear superposition)– Transient – Modal– Frequency Response– Linear & Non‐linear

ANSYS nCode DesignLife has an extensive scope of fatigue capabilities…


ANSYS® nCode DesignLife™What is the Product? ‐ Benefits

Perform virtual durability assessment up front to reduce reliance on physical test and avoid costly design and tooling changes

Perform smarter and quicker physical tests by simulating first

Design durability into your products and reduce warranty claims


ANSYS® nCode DesignLife™What is the Product? ‐ Benefits

Standardize analysis processes to improve consistency and quality

Automate processes to better utilize engineers’ time and workload

•Assess more design options, consider more realistic loading conditions and more confidently reduce cost and weight


Wheel– ANSYS calculates stresses for 18 static analyses as tire loads rotate

around the wheel.– DesignLife produces stresses histories at every node on the wheel model,

and predicts the number of revolutions of the wheel that will cause it to crack.

Wind Turbine– ANSYS calculates stresses for 6 separate load cases. ( force in the X,Y,& Z

directions, and moments about the X,Y,& Z directions on the hub of the wind turbine)

– DesignLife pairs the stresses from ANSYS with predicted load and moment histories for multiple wind conditions. The stress histories for the various wind conditions are assembled into a 20 year schedule, and a factor of safety for 20 years of operation is calculated at every location of the component.

ANSYS® nCode DesignLife™What is the Product


Aircraft Control Valve– ANSYS calculates the frequency response of the valve due to

accelerations at its mounting location.– DesignLife uses that frequency response and calculates the hours of

operation prior to cracking when subjected to a swept sine acceleration test.

Turbocharger Housing– ANSYS calculates the stress history due to a 30 minute thermal cycle, and

the stresses due to a 40 Hz mechanical excitation.– DesignLife superimposes the thermal and mechanical stresses into a

720,000 point time history and calculates the turbocharger housing’s life in hours of operation.

ANSYS® nCode DesignLife™What is the Product



Product Packages!


ANSYS® nCode DesignLife™Product Packages!

Package/Module DescriptionANSYS nCode DesignLife Standard Base package including Stress-Life,

Strain-Life and Dang Van analyzers

ANSYS nCode DesignLife Modules/add-onsANSYS nCode DesignLifeVibration

Adds ability to do vibration fatigue analysis. Simulate swept sine and PSD loadings

ANSYS nCode DesignLifeAccelerated Testing

Signal processing package complementary to vibration option. Design accelerated virtual and physical vibration tests.

ANSYS nCode DesignLifeWelds

Fatigue life prediction for seam welds and spot welds.

ANSYS nCode DesignLifeParallelization

DesignLife is multi-threaded and licensed per core with one core included in the base package.


ANSYS® nCode DesignLife™ANSYS nCode DesignLife Standard

Standard Package includes:

Description Applications

Stress-Life Enables fatigue life calculations to be made using the stress-life approach. Includes the ability to interpolate between material curves depending on the temperature. Python scripting can also be used to add new or proprietary SN methods.

High-cycle fatigue (long lives) where nominal stress controls the fatigue life.

Strain-Life Enables fatigue life predictions to be made using the local strain approach. Includes the ability to interpolate between material curves depending on the temperature at each location.

Wide range of problems including low-cycle fatigue with the local elastic-plastic strain controls the fatigue life.

Dang Van analyzers

Enables Dang Van safety factor calculations. The Dang Van criterion is a method of predicting the endurance limit under complex loading situations. The output from the analysis is always expressed as a safety factor not a fatigue life. Specific material parameters are calculated from tensile and torsion tests.

Engine and powertrain-type applications where there are very large numbers of loading cycles.


ANSYS® nCode DesignLife™Product Packages!

Platform Processor Operating System

Windows (64-bit) x64 Windows 7 64-bit, Vista64, XP 64

Windows (32-bit) x86 Windows 7, Vista, XP

“A nice complement to WB 2.0, both from the technical capabilities standpoint and the GUI standpoint—it’s interesting how much the DesignLife work area and the WB2 Project Schematic resemble each other.”

Availability and Compatibility


ANSYS nCodeDesignLife™

FAQs!


ANSYS® nCode DesignLife™FAQs!

Q. What is the difference between ANSYS nCode DesignLife Standard and nCode’s standalone product?

A. The ANSYS product is integrated within the Workbench 2.0 framework, otherwise, they are identical. (Prior to the 12.1 release, the ANSYS version could only read ANSYS files, but now it can read all FE codes that the nCode version supports.)



Q. Where will customers get their fatigue properties?

A. ANSYS nCode DesignLife contains the complete nCode DesignLifeMaterial Library integrated into Engineering Data.

Additionally, nCode has a materials testing service that customers may wish to use for unique materials or conditions.



Q. What is the difference between ANSYS nCode DesignLife and the ANSYS Fatigue module?

A. The ANSYS Fatigue module is very limited in what it can do. No critical plane capability and therefore no non‐proportional non‐constant amplitude loading. Loading is limited to a single time history or a specific 2 load case option. ANSYS Fatigue cannot analyze multiple events (It has no “duty cycle” capabilities). Also, it does not support vibration, spot‐weld, or seam‐weld…



Q. Are there any Fatigue capabilities that ANSYS customers use that are not available in nCode DesignLife or its modules?

A. Currently, ANSYS nCode DesignLife does not perform the ASME Boiler and Pressure Vessel fatigue calculations as specified by this code. This will be in the R14 release.Notably:• Through thickness integration of stresses• Linearize stresses to determine equivalent membrane and bendingstresses• Consistent method of stress recovery for solid models


Thank You!Hari Subramaniam

Tel: +1 714.918.1866

[email protected]

Ray Browell

Tel: +1 724.514.3070

[email protected]

ANSYS® nCode DesignLife™

ugm ncode 2011 - ansys · pdf fileansys ncode designlife standard base package including...

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