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SUMMARY:Mechanics of soft composites: From deployable structures to self-o
 rganized patterns
DTSTART:20160202T140000
DTEND:20160202T150000
DTSTAMP:20260916T043411Z
UID:7f3bdb86f747fd700fee4cf1ffb71bde33d429961f25e93f28190877
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Francisco López Jiménez\, Elasticity\, Geometry and Stat
 istics Laboratory\, Massachusett Institute of Technology\, USA\nBio: Franc
 isco López Jiménez earned his BSc in Mechanical Engineering from the Uni
 versity of Seville (Spain)\, and a MSc in Aerospace Engineering and a PhD 
 in Aeronautics from Caltech. His PhD thesis focused on the experimental an
 d computational study of fiber composites for deployable space structures.
  He then completed postdoctoral research at the Laboratoire de Mécanique 
 des Solides in École Polytechnique (Palaiseau\, France)\, studying instab
 ilities in cellular solids. He is currently a postdoctoral associate at th
 e Elasticity\, Geometry and Statistics Laboratory at MIT\, where he focuse
 s on the mechanics of soft solids. His research interests lie in the inter
 section of composite materials\, lightweight structures and soft solids\, 
 with focus on their instabilities and nonlinear mechanics.\nAbstract :  T
 he design of new materials has recently started considering composite mate
 rials with soft components\, since there are several applications that can
  take advantage of their flexibility and nonlinear mechanical response. In
  this talk\, I will present two examples of this trend. First\, a composit
 e in which stiff carbon fibers are embedded in a soft elastomeric matrix. 
 Elastic fiber microbuckling allows thin sheets made with this material to 
 be folded to virtually zero radius while retaining their tensile stiffness
 \, which makes them interesting as components in deployable structures for
  aerospace satellites. A combination of experiments and simulations will b
 e used to characterize the micro mechanics of this composite\, and provide
 s accurate estimates for its mechanical response and failure properties. S
 econd\, I will present a study of the different self-organized patterns th
 at result from the wrinkling of elastic bilayers under compression. By con
 trolling the material properties and the geometry of the problem\, the ins
 tabilities range from dimples to high-aspect ratio ridges. I will show how
  these patterns offer an experimental system to explore and model differen
 t physical phenomena\, from curved crystals to the growth of biological ti
 ssue\, as well as a technique to design materials with enhanced functional
 ity\, such as tunable optical transparency.
LOCATION:Auditorium A. Palaz http://plan.epfl.ch/?zoom=20&recenter_y=58640
 06.31323&recenter_x=730999.51717&layerNodes=fonds\,batiments\,labels\,info
 rmation\,parkings_publics\,arrets_metro\,transports_publics&floor=0&q=me_d
 0%201418
STATUS:CONFIRMED
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