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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:Load Sequence Effects in Structural Durability
DTSTART:20141114T121500
DTEND:20141114T131500
DTSTAMP:20260429T195607Z
UID:0e4aa6b0d3560155868fa022f60ba84e50b8db6115d4e6fd8ec22549
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr Michael Vormwald\, (TUD) Technische Universität Darm
 stadt\, Allemagne\nAssessment of variable amplitude fatigue lives requires
  the application of a damage accumulation rule. The linear damage accumula
 tion rule is widely used. Due to the summation rule for the relative consu
 med fatigue life its basic property is that the sequence of occurrence of 
 the various cycles does not influence the calculation results. It is well 
 known that the linear damage accumulation rule has deficiencies. They are 
 related to the fact that in the physical fatigue damage accumulation the s
 equence of the occurrence of individual cycles indeed plays an important r
 ole. The material and the structure\, respectively\, have the ability to s
 tore information on prior loading histories. The damage – when measured 
 in physical quantities\, e.g. crack lengths\, rather than sums of relative
  consumed fatigue life – of an individual cycle may be larger or smaller
  in variable amplitude fatigue compared to the constant amplitude case. In
  an attempt to rationalize the physical basis of sequence effects a classi
 fication of physical phenomena was undertaken. Two main groups of informat
 ion storage possibilities have been identified: material’s plastic defor
 mation and irreversible material separation processes leading to a changin
 g geometry of the structure.\nBio : In 1983\, Professor Vormwald received 
 a diploma of the Technische Universität of Darmstadt (TUD) in civil engin
 eering. He earned his doctorate in 1988 at the TUD to the doctor of engine
 ering with a thesis on crack initiation life prediction for variable ampli
 tude loading. He then worked until 1993 as a test engineer and project man
 ager at the Industrieanlagen-Betriebsgesellschaft\, Ottobrunn\, where he g
 ained practical experience in the durability design of mechanical engineer
 ing structures. He continued his scientific career with appointments as a 
 professor at the University of applied science Jena\, the Bauhaus Universi
 ty Weimar and until today at the TUD. His research work is focused on all 
 aspects of deformation and failure processes with a special attention on t
 he fatigue strength. The developed methods of evaluating strength have the
  aim to increase the safety of technical equipment. They should be underst
 ood and applied by engineers. He published over 70 articles\, wrote well o
 ver 100 technical reports on strength investigations and his the co-author
  of several books among which : Advanced methods of fatigue assessment\, w
 ith Dieter Radaj.
LOCATION:GC C3 30 http://search.epfl.ch/psearch.action?q=GC%20C3%2030
STATUS:CONFIRMED
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