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SUMMARY:Failure criteria and plane strain collapse - Prof. Rocco Lagioia\,
  DICATAM – University of Brescia\, Italy
DTSTART:20130718T150000Z
DTEND:20130718T163000Z
UID:TALK46262@talks.cam.ac.uk
CONTACT:Anama Lowday
DESCRIPTION:The use of numerical analyses of boundary values problems has 
 become very frequent in both\nresearch and geotechnical practice. There ar
 e numerous examples of the successful application of\nthese techniques to 
 even very complex situations. Surprisingly\, however\, simple geotechnical
 \nproblems can be found in the literature for which the use of these techn
 iques is problematic\, even\nwhen the soil behaviour is reproduced by mean
 s of very simple constitutive models\, such as those\nbased on the theory 
 of perfect plasticity.\nIn this talk it will be shown that many of the pro
 blems are related to the formulation of classical\nfailure criteria for ge
 omaterials and that the adoption of a very recent reformulation of two suc
 h\ncriteria\, namely the Mohr-Coulomb and the Matsuoka-Nakai\, allows to p
 erform the analyses\nwithout any problem. As numerical analyses are often 
 performed by considering a cross section of\nan infinite long structure\, 
 the link between failure conditions and plane strain plastic collapse will
 \nbe also discussed and sources of potential problems highlighted.\n\nRocc
 o Lagioia. He obtained his honor degree in Structural Engineering from the
  University of Bari\,\nItaly (now Technical University). After two years f
 ull time consulting as concrete structure designer\nhe moved to Milan Univ
 ersity of Tecnology (Politecnico) where he started his Ph.D. in\nGeotechni
 cal Engineering\, studying the stress-strain response of structured soils.
  He worked at\nImperial College with Peter Vaughan on the experimental beh
 aviour of these geomaterials and then\ncompleted the Ph.D. in Milan with R
 oberto Nova where he developed a constitutive model for those\nsoils.\nHe 
 then moved to École Nationale des Ponts et Chaussées for his post-doc an
 d from there back to\nImperial College as a research fellow.\nAfter going 
 back to Milan\, he became lecturer and then associate professor of Geotech
 nical\nEnginering at the University of Brescia.\nHe has built two laborato
 ries\, for the Politecnico Milan and for the University of Brescia \,\ncon
 sulted for the development of the laboratory of the second University of M
 ilan Bicocca and has\ndesigned and constructed numerous laboratory apparat
 uses.\nHis research interests are in experimental soil mechanics\, constit
 utive modelling and numerical\nanalyses.\nHe is currently member of the ad
 visory panels of Géotechnique and Géotechnique Letters.
LOCATION:Engineering Department - Lecture Room 6
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