ANSYS nCode DesignLife training

Introduction to ANSYS nCode DesignLife
ANSYS nCode DesignLife Standardbase package with Stress-Life (SN) and Strain-Life (EN) analysis engines

ANSYS nCode DesignLife Vibration
vibration fatigue for swept sine and PSD loadings
ANSYS nCode DesignLife Accelerated Testing
simulate accelerated virtual and physical tests
ANSYS nCode DesignLife Welds
fatigue evaluation of seam and spot welds
ANSYS nCode DesignLife Parallelization
multi-threaded and licensed per core
one core included in standard package
only applicable for SMP

ANSYS nCode DesignLife is a CAE durability software product developed by HBM nCode and data integrated into the Workbench platform
Windows and Linux versions
finite element (FE) based CAE fatigue tool
performs fatigue evaluation using FE results (e.g., ANSYS .rst file)
seamlessly integrated into Workbench
easy communication with ANSYS Mechanical
predefined WB analysis systems
WB file management
Engineering Data
does not use ANSYS license – uses HBM nCode license
Equivalent functionality as HBM nCode DesignLife
industry leading CAE durability software product
full access to standalone version of DesignLife
standalone version is not integrated into WB

Introduction to CAE Fatigue


DesignLife Interface

Importing FE Results


Load Mapping
Explain role of load mapping in fatigue analysis
Constant Amplitude, Time Series, and Time Step load mappings

Duty Cycles
Explain how to create duty cycles
Explain how to post-process duty cycles

Stress-Life Fatigue
Stress-life (SN) fatigue assumes that fatigue damage is produced by fluctuating stresses
stresses drive fatigue
original numerical fatigue approach
based on alternating stress range and Wöhler fatigue curves (S-N curves)
vast amount of industry experience
still most widely used fatigue analysis method
only applicable to elastic stresses
limited to low stress/high cycle applications
usually more than 100,000 cycles to failure for ductile metalssimple technique
often can be checked with hand calculations

Strain-Life Fatigue
Strain-Life (EN) fatigue assess fatigue damage using cyclic strain ranges and the Strain Life Relationship equation
local plastic strains drive fatigue
applicable to both low cycle and high cycle applications
stresses less than or greater than yield
uses elastic-plastic strains
either directly calculated or adjusted from elastically calculated

Random Vibration Fatigue
Fatigue damage is typically assessed for time based loading
Random loading cannot be effectively evaluated in the time domaincan be evaluated in the frequency domain using a statistical approach
Vibration fatigue determines the damage caused by random loading

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