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WCFA'19-PHL

Programme of the Workshop

The course is built in such a way, that no prior knowledge on fatigue analysis is needed. The basic principles of the common fatigue damage estimation are described in the first day, while the lectures of Dr Heuler follow in next two days. In order to better suit the needs of participants and to fit the course better to the level of their knowledge, several variants of the course are provided as shown in the table below.

Monday
Dec 2, 2019
V1 - Introduction to Fatigue
M. Růžička, J. Papuga, M. Nesládek
V3 - Complete Course
Tuesday-Wednesday
Dec 3-4, 2019
V2 - Audi Experience
P. Heuler

Topics discussed in individual days follow. The more precise program will be released by the end of September.

Dec 2, 2019 - Introduction to Fatigue

  • History of Fatigue and Fatigue Prediction Methods
  • Materials, loading
  • Stress-Life Based Fatigue
  • Strain-Life Based Fatigue
  • Factors Affecting Fatigue Life
  • Multiaxial Fatigue
  • Processing of Load Records
  • Fatigue Prediction in Welds
  • Fracture Mechanics
  • The Concept of FE Based Fatigue Analysis
  • Commercial Applications
  • Available Data Sources

Dec 3, 2019 - Audi Experience Vol. 1

Statistical concept of fatigue strength assessment

  • Load and strength/durability as stochastic variables
  • Distribution and probability density functions
  • Probability of failure resulting from distributed load and durability variables
  • Typical scatter values of metallic components
  • Some remarks on lower limits of fatigue properties

Derivation of load spectra and requirements

  • Evaluation of load measurements via counting procedures
  • Characterization of load spectra
  • Extrapolation of load measurements and load spectra

Load assumptions and requirements for strength and durability assessment of automotive structures

  • Definition of basic requirements for characteristic load and strength variables
  • Load measurements – basis for derivation of load requirements
  • Scaling of load variables for a common evaluation
  • Numerical procedures for load estimates using multi-body-system analyses and FE codes
  • Substantiation of load requirements through field measurements

Standardised Load-Time Histories

  • Origins of standardised load-time histories
  • Overview and some details of present standardised load-time histories
  • Features of load histories relevant to cumulative fatigue damage
  • Generation and synthesizing of load-time histories
  • Applications – car trailer coupling

Dec 4, 2019 - Audi Experience Vol. 2

Basic Elements and Specific Aspects of Fatigue Life Prediction Concepts

  • Local strain – local stress concept
  • Assessment of local stress-strain paths at notches
  • The cumulative damage problem
  • Transferability of fatigue data of materials and joints to components
  • Simplified life prediction exercise for some components

Numerical strength and fatigue life assessment of automotive structures

  • Further remarks on MBS modelling and simulation
  • The process chain of numerical fatigue assessment
  • Consideration of joining techniques by a sub-model concept
  • Aspects of FE modelling and applications
  • Some hints on the assessment of oscillating components

 

 


Timetables of past volumes


papuga@pragtic.com, last update: September 10, 2019

Czech Society for Mechanics

FME   CTU in Prague

 

 

 

EXTERN LINKS:

Title PragTic

FADOFF Project

FKM Guideline Training

Design and Fatigue of Weldments

Vibration Fatigue Analysis

D&DT for Aircraft Engineers