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SUMMARY:Semi-Analytic Modeling of Micro-Defects in an Infinite Semi-Infini
 te Matrix - Professor Leon Keer (Northwestern University)
DTSTART:20090323T141500Z
DTEND:20090323T153000Z
UID:TALK17345@talks.cam.ac.uk
CONTACT:Anita Clayson
DESCRIPTION:Micro-defects are often ubiquitous in engineering materials an
 d structures. For example\, bearings contain inhomogeneities\, cracks and 
 voids. Micro-defects often influence the mechanical and physical propertie
 s of materials at the global and local scales\, and in most cases\, micro-
 defects are  detrimental to the life of products. We solved the problem of
  multiple inhomogeneous inclusions in an infinite space by using the equiv
 alent inclusion method. Using similar techniques\, the problem of multiple
  inclusions in a half space was \nalso solved.\n\nA fast Fourier transform
  algorithm and a modified conjugate gradient method were developed to eval
 uate the solutions. These solutions had the following features: multiple i
 nhomogeneous inclusions and their interactions were considered\, they coul
 d be irregular and could have different material properties. Examples will
  be presented.\n\nBrief Biographical Sketch:\n\nLeon M Keer was educated t
 he the California Institute of Technology and the University of Minnesota.
  In 1964 he joined the faculty at Northwestern University in the Departmen
 t of Civil Engineering. He is currently Walter P Murphy Professor in Civil
  and Mechanical Engineering. His areas of research are contact mechanics\,
  structure and fatigue. He has been active in many professional societies.
  In the American Society of Mechanical Engineers he was Technical Editor o
 f the Journal of Applied Mechanics and has received the Drucker Medal and 
 the Mayo D. Hersey Award.
LOCATION:Department of Engineering - Oatley Seminar Room
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