Structural Durability & Fatigue Assessment
_Prof. Dr.-Ing. Cetin Morris Sonsino specialist in structural durability at the Fraunhofer Institute for Structural Durability and System Reliability LBF, Darmstadt
_Dr.-Ing. Laurent Wahl & Dipl.-Ing. Stephan Sellen University of Luxembourg
directed by Prof. Dr.-Ing Stefan Maas University of Luxembourg
Tuesday 08 April 2014, 10:00 to Thursday 10 April 2014, 17:00, Salle des conseils Campus Kirchberg
Participation fee 500 € (UL staff and students: 250 €) including accompanying documents and catering
Registration until 15 March 2014 by transferring on following account
• Account title Université du Luxembourg
• IBAN LU71 0019 2355 9897 2000 – BIC/SWIFT BCEELULL
• Mandatory communication on bank transfer F1C-ING-EVT-14STDU – full name of participant, organisation/company/institution
Contact annabella.simon@uni.lu (+352) 46 66 44 5237
Programme
1. Definition of structural durability, design criteria for safety components (misuse, special events / structural yield point, designated normal driving conditions), determination of Woehler- (LCF, MF, HCF) and Gassner-lines, statistical features and parameters, failure criteria
2. Statistics, risk covering, significance analysis, probabilities of survival and failure, exercises in statistics
3. Stress concentration, micro- and macrosupport, structural yield point and structural durability, size effect
4. Material selection under service loadings (crash, impact, cyclic) and under consideration of geometry and manufacturing (cast, forged, welded, plastics), mean-stress sensitivity, improvement techniques of fatigue strength, environment (corrosion, temperature), exercises in material selection and local stress evaluation
5. Cycle counting methods and cumulative damage, damage equivalence, reduction of testing time, multiaxial fatigue (selected hypotheses / critical plane concepts), design criteria for component development, concepts of nominal-, structural- and notch-stresses (strains), exercises in determination of spectra and fatigue life estimation
6. Examples:
a. Component design (not welded (torque lever, angle lever, pressure vessel, stubaxle) and welded (blade support, trailer link, automotive door)) according to different concepts
b. Fatigue assessment of aluminium honeycomb lightweight plates (Laurent Wahl)
c. Design of high pressure aluminium valves (Stephan Sellen)
7. Final conclusions with regard to liability
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