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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:20260407T105713Z
UID:69614b66d32bdba80f056abc0f438eeb8fba8f5167916620264888c8
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr Michael Vormwald\, Technische Universität Darmstadt\
 , Allemagne\nAssessment of variable amplitude fatigue lives requires the a
 pplication of a damage accumulation rule. The linear damage accumulation r
 ule is widely used. Due to the summation rule for the relative consumed fa
 tigue life its basic property is that the sequence of occurrence of the va
 rious cycles does not influence the calculation results. It is well known 
 that the linear damage accumulation rule has deficiencies. They are relate
 d to the fact that in the physical fatigue damage accumulation the sequenc
 e of the occurrence of individual cycles indeed plays an important role. T
 he material and the structure\, respectively\, have the ability to store i
 nformation on prior loading histories. The damage – when measured in phy
 sical quantities\, e.g. crack lengths\, rather than sums of relative consu
 med fatigue life – of an individual cycle may be larger or smaller in va
 riable amplitude fatigue compared to the constant amplitude case. In an at
 tempt to rationalize the physical basis of sequence effects a classificati
 on of physical phenomena was undertaken. Two main groups of information st
 orage possibilities have been identified: material’s plastic deformation
  and irreversible material separation processes leading to a changing geom
 etry of the structure.\nBio : In 1983\, Professor Vormwald received a dipl
 oma of the Technische Universität of Darmstadt (TUD) in civil engineering
 . He earned his doctorate in 1988 at the TUD to the doctor of engineering 
 with a thesis on crack initiation life prediction for variable amplitude l
 oading. He then worked until 1993 as a test engineer and project manager a
 t the Industrieanlagen-Betriebsgesellschaft\, Ottobrunn\, where he gained 
 practical experience in the durability design of mechanical engineering st
 ructures. He continued his scientific career with appointments as a profes
 sor at the University of applied science Jena\, the Bauhaus University Wei
 mar and until today at the TUD. His research work is focused on all aspect
 s of deformation and failure processes with a special attention on the fat
 igue strength. The developed methods of evaluating strength have the aim t
 o increase the safety of technical equipment. They should be understood an
 d applied by engineers. He published over 70 articles\, wrote well over 10
 0 technical reports on strength investigations and his the co-author of se
 veral books among which : Advanced methods of fatigue assessment\, with Di
 eter Radaj.
LOCATION:GC C3 30 http://search.epfl.ch/psearch.action?q=GC%20C3%2030
STATUS:CANCELLED
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