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Fatigue Analysis using Finite Element (FEA) Results

Course Overview

Learn how to use nCode DesignLife software to perform fatigue analysis using stresses from computer aided engineering (CAE) tools. Class time includes both lecture on fatigue life prediction techniques and hands-on sessions where you get to put concepts into action with DesignLife software. An emphasis is placed on hands-on comparisons of different analysis techniques so you’ll learn best engineering practices while gaining software proficiency.

 

 

Objectives

  • Import geometry and stresses into DesignLife from finite element (FE) software like ANSYS, ABAQUS, NASTRAN, LS-Dyna, Mechanica, and OptiStruct
  • Define fatigue loading, from simple cycles to measured loading histories to vibration profiles
  • Assign material fatigue properties Assess fatigue life with methods like stress-life (SN) and strain-life (EN)
  • Display and interpret results

Course Concepts

  • Finite element stress analysis techniques for durability assessment
  • Using analysis tools called ‘glyphs’, including how to create user-customized glyphs
  • Creating reusable fatigue analysis templates
  • Generating virtual stress and strain histories
  • Applying stress superposition and multiple FE load cases
  • Exploring stress combination methods and plasticity corrections
  • Analyzing stresses in both time and frequency domains
  • Identifying and interpreting fatigue hotspots
  • Automated methods for accelerating fatigue solution times

Course Agenda

Duration: 3 Days

Day 1

  • HBM-nCode Product Range
  • Introduction to Fatigue
  • Introduction to DesignLife
  • A Road Map to Fatigue Analysis

Day 2

  • Using FE Stresses for Fatigue
  • Elastic-Plastic Correction
  • Duty Cycles
  • Advanced Edit
  • Computational Efficiencies

Day 3

  • Virtual Strain Gauge
  • Load Reconstruction and Gauge Placement
  • Seam Weld Fatigue
  • Spot Weld Fatigue
  • Adhesive Bonds
  • Modal Superposition
  • Vibration Fatigue
  • Bill of Material
  • Stress Gradients
  • Temperature Dependent Fatigue
  • Safety Factor Analysis
  • Dang Van Multiaxial Fatigue
  • Short Fiber Composite Fatigue

Who Should Attend?

The course is aimed at engineers who need to predict fatigue life from FE-derived stresses.

It is assumed that attendees are familiar with FE modelling practices and general structural analysis concepts. No prior knowledge of nCode software is required.

This course will briefly cover fatigue theory, but it will focus on using these concepts in software. Attendees looking to learn more about the background of fatigue theory are encouraged to attend our course called Practical Fatigue Theory.

Upcoming Classes

Please note that classes organized outside of North America are subject to VAT. VAT will depend on the office that organizes the event or where it is held, regardless of where the attendee resides.

Course calendar