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WCFA'18-FKM
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 content related to the fatigue analysis of weldments is extensively discussed 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 Nov 26, 2018 | V1 - Introduction to Fatigue
M. Růžička, J. Papuga, J. Jurenka |
V4 - Fatigue of Non-Welded Components | V5 - Complete Course | |
| Tuesday Nov 27, 2018 | V2 - Complete FKM-Guideline
R. Rennert |
V3 - FKM - Non-Welded Components | ||
| Wednesday Nov 28, 2018 |
The complete programme can be downloaded here as a pdf file.
Introduction to Fatigue
This part is covered in variants: Introduction to Fatigue (V1), Fatigue of Non-Welded Components (V4), Complete Course (V5).
| Monday, November 26, 2018 | ||
| 8:00-8:50 | Registration | |
| 8:50-9:00 | Jan Papuga | Welcome info |
| 9:00-9:45 | Milan Růžička | History of fatigue and fatigue estimation methods 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 | Josef Jurenka | Fracture Mechanics and Crack Propagation |
| 14:30-15:00 | Josef Jurenka | 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 |
FKM - Non-Welded Components
This part is included in all variants except of Introduction to Fatigue (V1).
| Tuesday, November 27, 2018 | ||
| 8:00-8:50 | Registration | |
| 8:50-9:00 | Jan Papuga | Welcome info |
| 9:00-10:30 | Roland Rennert | General introduction into FKM-Guideline: Basics to stress formulations and strength assessment Basic philosophy, application range, formal structure of FKM-Guideline. |
| 10:30-11:00 | Coffee break | |
| 11:00-12:30 | Roland Rennert | Static strength assessment for non-welded components: Assessment stresses: calculation of combined stress Material strength: static strength values from standards or from drawing, technological size factor, temperature factor Component strength: Section factor, Neuber’s hyperbola and critical strain, plastic notch factor Safety factors Result of static strength assessment: degree of utilisation Example: Centre pin of a tram (static strength) |
| 12:30-13:30 | Lunch | |
| 13:30-15:00 | Roland Rennert | Fatigue strength assessment for non-welded components: Assessment stresses: stress spectrum, proportional and non-proportional stresses Material strength: fatigue strength factor Component strength: design factor (Kt-Kf-ratio, surface roughness, …), mean stress factor and Haigh diagram |
| 15:00-15:30 | Coffee break | |
| 15:30-17:00 | Roland Rennert | Fatigue strength assessment for non-welded components: Cumulative damage approach: generalised S-N curves, Miner’ rule with modifications and effective damage sum, inverse calculation of Miner’s rule and derivation of variable amplitude factor, equivalent stress amplitude Safety factors Result of fatigue strength assessment: degree of utilisation Example: Centre pin of a tram (fatigue strength) |
| 20:00-22:00(?) | BOWLING & Billiard Dejvice (informal social meeting, www.bowling.cz) | |
FKM - Welded Components
This part is covered only within variants Complete FKM-Guideline (V2) and Complete Course (V5).
| Wednesday, November 28, 2018 | ||
| 8:00-9:30 | Roland Rennert | Assessment stresses for welded components: Coordinate system on weld line Nominal stresses, structural stresses, effective notch stresses Consideration of misalignment Static strength assessment for welded components: Assessment for base material, heat affected zone and welding Material strength: softening factor for aluminium Component strength: weld factor for steel and aluminium Safety factors and utilisation |
| 9:30-10:00 | Coffee break | |
| 10:00-11:30 | Roland Rennert | Fatigue strength assessment for welded components: Component strength: FAT-class, FAT-factor, thickness factor Residual stress factor and mean stress sensitivity S-N curves for welded joints in different standards Safety factors and utilisation Academic example: butt weld with bore hole under variable amplitude load Application example: T-Joint with countersink |
| 11:30-12:30 | Lunch | |
| 12:30-14:00 | Roland Rennert | Fatigue strength assessment based on measured stresses: Preparations: suitable measurement values, sample rate, measurement duration Correction of measurement data Combination of partial measurements Rain-flow counting Mean stress transformation Application of equivalent stress amplitude |
| 14:00-14:30 | Coffee break | |
| 14:30-16:00 | Roland Rennert | Fatigue strength assessment based on measured data: Hints to database and synthetic S-N-curves Hints to experimental estimation of fatigue strength values: pearl line method, horizon method, stair case method |
Timetables of past volumes
papuga@pragtic.com, last update: November 30, 2018
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