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SUMMARY:I) A homogenization model for particulate composites\; II) Spheric
 al indentation of poroelastic layers - Dr Matteo Galli\, CUED
DTSTART:20081017T130000Z
DTEND:20081017T140000Z
UID:TALK13659@talks.cam.ac.uk
CONTACT:Ms Helen Gardner
DESCRIPTION:A technique to generate three-dimensional microstructural mode
 ls for the homogenization of the mechanical properties of particle reinfor
 ced composites is proposed. Particles are created in an already existent t
 etrahedral mesh of a cubic domain. Therefore\, models for materials with d
 ifferent compositions can be developed from the same discretization. The m
 odel is tested by performing homogenization of the elastoplastic behaviour
  of a typical particle reinforced metal matrix composite. To assess the re
 presentative volume element size a criterion based on the steadiness of th
 e average elastic energy related to residual stresses is proposed. Example
 s of applications of the model to real materials are provided.\n\n\nIndent
 ation testing of a finite poroelastic layer is considered. By adopting non
 dimensional parameters it is possible to build a library of master curves 
 which represent the test response as a function of the test profile and of
  the material properties. Such an approach allows conducting material para
 meter identification without the need for inverse FE analysis\, allowing f
 or rapid analysis of large numbers of indentation tests.\n\n\nMatteo Galli
  is currently working with Michelle Oyen. He holds a M.S. degree in Civil 
 Engineering from Politecnico di Milano\, Italy\, and a Ph.D. degree in Mec
 hanics from EPFL\, Switzerland.
LOCATION:Oatley Seminar Room\, Department of Engineering
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