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SUMMARY:Biomimetic 4D Printing
DTSTART:20160208T140000
DTEND:20160208T150000
DTSTAMP:20260410T034205Z
UID:aeed2dd714cecc0aaafaef0c5f4a040a258f9bf80e9d4f96426573ff
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Elisabetta Matsumoto\, School of Engineering and Applied S
 ciences\, Harvard University\nBio: I am a postdoctoral fellow at the Harva
 rd Paulson School for Engineering and Applied Science in the Applied Mathe
 matics group.  I am additionally affiliated with the Harvard MRSEC and Wy
 ss Institute.\nMy research focuses on the coupling between geometric and t
 opological microstructure and emergent physical properties in complex soft
  matter systems.  This includes multiple systems in a wide range of field
 s\, including soft robotics\, polymer systems\, biological physics\, biome
 dical and tissue engineering\, textiles\, mechanical metamaterials and aux
 etics.  My other interests include scientific visualization and 3D animat
 ion.\nI am currently working with Prof. L. Mahadevan on anisotropic elasti
 city in a variety of systems\, Prof. Michael Brenner on self assembly of b
 raided structures\, and Prof. Jennifer Lewis on 4D printing and programmab
 le matter.\nPreviously\, I completed a Postdoctoral Fellowship at the Prin
 ceton Center for Theoretical Sciences at Princeton University.  In 2011\,
  I received my PhD from the Department of Physics and Astronomy at the Uni
 versity of Pennsylvania supervised by Prof. Randall Kamien. \nThe nascent
  technique of 4D printing has the potential to revolutionize manufacturing
  in fields ranging from organs-on-a-chip to architecture to soft robotics.
  By expanding the pallet of 3D printable materials to include the use stim
 uli responsive inks\, 4D printing promises precise control over patterned 
 shape transformations. With the goal of creating a new manufacturing techn
 ique\, we have recently introduced a biomimetic printing platform that ena
 bles the direct control of local anisotropy into both the elastic moduli a
 nd the swelling response of the ink.\nWe have drawn inspiration from nasti
 c plant movements to design a phytomimetic ink and printing process that e
 nables patterned dynamic shape change upon exposure to water\, and possibl
 y other external stimuli. Our novel fiber-reinforced hydrogel ink enables 
 local control over anisotropies not only in the elastic moduli\, but more 
 importantly in the swelling. Upon hydration\, the hydrogel changes shape a
 ccord- ing the arbitrarily complex microstructure imparted during the prin
 ting process.\nTo use this process as a design tool\, we must solve the in
 verse problem of prescribing the pattern of anisotropies required to gener
 ate a given curved target structure. We show how to do this by constructin
 g a theory of anisotropic plates and shells that can respond to local metr
 ic changes induced by anisotropic swelling. A series of experiments corrob
 orate our model by producing a range of target shapes inspired by the morp
 hological diversity of flower petals.
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STATUS:CONFIRMED
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