3° International conference
on material and component performance under Variable amplitude loading - VAL 2015
March 23 - 26, 2015 Prague, Czech Republic
Minisymposium on:
'Tatigue life assessment with random loadings: spectral methods^ dynamic simuiations, testing^^
15.10 - 15.20 opening
15.20 - 16.00 presentation + discussion (40 min.)
16.00 - 16.30 coffee break + Poster session (Part 1)
16.30-18.00 presentation + discussion ( l h 3 0 ) 18.00-18.10 closing
Participants
• Universities and research centers:
• Slovak University of Technology (Slovak Republic) • Universidade de Lisboa (Portugal)
• Istanbul Technical University (Turkey)
• Faculty of Mech. Engineering and Naval Architecture (Croatia) • Monash University (Australia)
• NASA Engineering and Safety Center (USA) • Japan Atomic Energy Agency (Japan)
• Mississippi State University (USA) • Agence d'Essai Ferroviaire (France)
• State Centre for Civil Aviation Flights Safety (Russia) • Nuclear Research Institute (Czech Republic)
• University of Zagreb (Croatia) • University of Ljubljana (Slovenia)
• Delft University of Technology (Netherlands) • University of Parma (Italy)
Companies:
• PSA Peugeot Citroen (France)
• Robert Bosch spol. s r.o. (Czech Republic) • Ford Otosan (Turkey)
• Doosan Bobcat Engineering s.r.o. (Czech Republic) • Rainpower Norge AS (Norway)
This mini-symposium is not a standard presentation session.
It is an open discussion among participants with different technical backgrounds, on the subject of''spectral methods'' and ''frequency-domain approach'' to fatigue with random loadings.
The open discussion helps to share experiences, opinions and ideas among participants, and it will decide the success of the meeting.
Initial suggested tonics
Initial suggested topics:
• Structural durability using spectral method • Fatigue life testing with random loadings
• The influence of mean stress on fatigue in spectral methods • Dynamic simulation vs. spectral methods
Fatigue damage assessment for non-Gaussian random loads with spectral methods;
Results evaluation - nr. of cycles useable for fatigue assessment; Sin on random - effective approach for solving;
Vibration axis x,y,z direction combinations and their effect to total life prediction;
The results quality at modal coordinates fatigue calculations with load data in time domain compared to the PSD profile excited analyses;
Woehler curves for vibrational data;
Spectrum load validation during fatigue and fatigue-crack growth testing Validated structural dynamics models in vibration fatigue;
Displacement mode shapes vs. strain mode shapes (experimental and theoretical differences);
(multi-directional global and local) load spectra for ship/offshore structures, (multi-directional) far field response spectra for structural details in
ship/offshore structures;
Selection of damage accumulation hypothesis; Fatigue life testing with random loadings;
Expected goals
Presentations and open discussion aim to:
• introduce some basic principles and accepted approaches in spectral fatigue analysis
• show the latest achievements in academic research ("theory")
• show case studies and examples in industry ("application")
• identify open problems
• establish a "community" and "joint working groups" interested in "spectral random fatigue"
