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SUMMARY:Deformation and failure processes in geologic materials at scales 
 from grains to basins. - Prof Ronaldo Borja\, Dept of Civil &amp\; Environ
 mental Engineering\,Stanford University
DTSTART:20080229T163000Z
DTEND:20080229T173000Z
UID:TALK9668@talks.cam.ac.uk
CONTACT:Zelda Stuck
DESCRIPTION:Sediments and sedimentary rocks display a wide range of deform
 ation and failure processes and structural styles that reflect their porou
 s and granular nature\, variable loading conditions and loading rates in a
 ctive depositional settings\, and complex chemical/mechanical water-sedime
 nt-rock interactions. A basic understanding of these multiscale deformatio
 n and failure processes is a prerequisite for successful energy and water 
 resource management and natural hazard mitigation. In keeping with this ye
 ar’s IAS theme of “multiscale modeling\,” my seminar will cover some
  of the engineering and geoscience research activities conducted at Stanfo
 rd University focusing on theoretical\, numerical and computational aspect
 s of deformation and failure processes in sediments and rocks across a wid
 e range of scales. “Multiscale” in the present context refers to the  
 physical scale of the problem of interest\, which may range from granular 
 scale controlling the behavior of small sediment samples tested in the lab
 oratory\, to basin scale encountered in the simulation of faulting and fol
 ding of rocks\, as well as in the studies of mountain building. I will pre
 sent some advanced numerical techniques that my group uses to model the co
 mplex deformation and failure processes from micron-scale to kilometer-sca
 le. An example includes preserving the numerical resolution of a centimete
 r-scale rock fracture superimposed over a kilometer-scale rock fold.\n\nMi
 cron-scale description: Microtomographic image of the solid phase of a Cas
 tlegate sandstone. Image resolution is 3.34 microns. Image volume is 1.4 c
 ubic millimeters. Reproduced from White\, Borja and Fredrich\, Acta Geotec
 hnica (2006).\n\nKilometer-scale description: Aerial view of Sheep Mountai
 n Anticline\, Wyoming\, USA\, looking southeast. Anticline plunges to nort
 hwest. Reproduced from Sanz\, Borja and Pollard\, Acta Geotechnica (2007).
 \n
LOCATION:Engineering Department - LR6
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