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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.

Introduction to Fatigue

This part is covered in variants: Introduction to Fatigue (V1), Complete Course (V3).

Monday, December 2, 2019
8:00-8:50   Registration
8:50-9:00 Jan Papuga Welcome info
9:00-9:45 Milan Růžička Basics in Fatigue
Materials Considerations
Loading Considerations
9:45-10:30 Jan Papuga Stress-Life Based Fatigue, fatigue limit, factors influencing the S-N curve
10:30-11:00   Coffee break
11:00-12:30 Jan Papuga Factors Affecting Fatigue Life (various other issues that can be encountered)
Strain-Life Based Fatigue (cyclic plasticity, Neuber correction)
Processing of Load Records (rainflow, damage accummulation)
An example of the workflow
12:30-13:30   Lunch
13:30-14:30 Martin Nesládek Introduction to Fracture Mechanics and Crack Propagation
14:30-15:00 Jan Papuga Introduction to Fatigue Prediction in Welds
15:00-15:30   Coffee break
15:30-17:00 Jan Papuga Multiaxial Fatigue
The Concept of FE Based Fatigue Analysis
Available Software Applications
Available Data Sources

Audi Experience Vol. 1

This part is included in all variants except of Introduction to Fatigue (V1).

Tuesday, December 3, 2019
8:00-8:50   Registration
8:50-9:00 Jan Papuga Welcome info
9:00-10:30 Paul Heuler 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
10:30-11:00   Coffee break
11:00-12:30 Paul Heuler Derivation of Load Spectra and Requirements:
Evaluation of load measurements via counting procedures
Characterization of load spectra
Extrapolation of load measurements and load spectra
12:30-13:30   Lunch
13:30-15:00 Paul Heuler 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
caling 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
15:00-15:30   Coffee break
15:30-17:00 Paul Heuler 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
20:00-22:00(?)   Informal social meeting - place and programme will be described later

Audi Experience Vol. 2

This part is covered only within variants Audi Experience (V2) and Complete Course (V3).

Wednesday, December 4, 2019
8:30-10:00 Paul Heuler 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
10:00-10:30   Coffee break
10:30-12:00 Paul Heuler 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 componentsk
12:00-13:00   Lunch
13:00-13:50 Jan Papuga What is FABER, and who is the FABEST
13:50-14:00 Jan Papuga Closing the workshop

 

 


Timetables of past volumes


papuga@pragtic.com, last update: October 3, 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

 

Fatigue 2020 conference by Engineering Integrity Society