BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Modeling of cemented granular aggregates - Application to the hard
 ness of wheat endosperm - Professor Jean-Yves Delenne
DTSTART:20120309T140000Z
DTEND:20120309T150000Z
UID:TALK35731@talks.cam.ac.uk
CONTACT:Ms Helen Gardner
DESCRIPTION:Wheat endosperm belongs to the broad class of cemented \ngranu
 lar materials such as sedimentary rocks or geomaterials such as mortars or
  concrete. They have in common a texture composed of particles embedded in
  a solid matrix of variable volume and cohesion with the particles. Their 
 heterogeneity can be described either in terms of the composition (phase v
 olume fractions\, contacts and bonds between the particles...) or in terms
  of transport properties such as force transmission which reflects the det
 ails of the composition.\n\nIn this talk\, I present a cohesive granular m
 odel of the wheat endosperm involving a discrete phase composed of starch 
 granules\, a continuous phase representing the protein matrix and pores. T
 he cohesion of the texture is governed by adherence between starch and pro
 tein\, reflecting the biochemical nature of the interface\, and the protei
 n content that controls the connectivity between starch granules. \nThe nu
 merical model is employed to simulate the behaviour of samples with variab
 le matrix volume fraction and particles–matrix adherence. Crack formatio
 n is analyzed in terms of particle damage as a function of matrix volume f
 raction and particle-matrix adherence. \nIn the case of the grinding of wh
 eat endosperm\, the cracking regimes are associated with the hardness clas
 ses of soft\, hard and durum wheat.
LOCATION:Oatley Seminar Room\, Department of Engineering
END:VEVENT
END:VCALENDAR