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SUMMARY:MechE Colloquium: Discontinuous compression structures: From tense
 grity planetary landers to lightweight metamaterials
DTSTART:20230328T120000
DTEND:20230328T130000
DTSTAMP:20260407T095527Z
UID:3d4ab245f2d4db7dc85fdc086ca874e7192aca66ab3195f852911f3b
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Julián J. Rimoli\, Samueli School of Engineering\, Univ
 ersity of California\, Irvine (UC Irvine)\nAbstract: The term tensegrity\,
  derived from tensional integrity\, refers to a certain class of structura
 l systems composed of bars and strings. Through adequate pre-stressing of 
 their string members\, tensegrity structures generally become mechanically
  stable. Traditional approaches for modeling their behavior assume that (i
 ) bars are perfectly rigid\, (ii) cables are linear elastic\, and (iii) ba
 rs experience pure compression and strings pure tension. In addition\, a c
 ommon design constraint is to assume that the structure would fail wheneve
 r any of its bars reaches the corresponding Euler buckling load. In realit
 y\, these assumptions tend to break down in the presence of dynamic events
 . In the first part of this talk\, we will introduce a physics-based reduc
 ed-order model to study aspects related to the dynamic and nonlinear respo
 nse of tensegrity-based planetary landers. We will then adopt our model to
  show how\, under dynamic events\, buckling of individual members of a ten
 segrity structure does not necessarily imply structural failure\, thus sig
 nificantly expanding the design space for such vehicles. In the second par
 t of this talk\, we will show how lessons learned from our tensegrity plan
 etary lander can be translated into to the development novel metamaterials
 . We will introduce the first known class-two 3D tensegrity metamaterial\,
  and show that this new topology exhibits unprecedented static and dynamic
  mechanical properties.\n\nBiography: Julian J. Rimoli is the Henry Samuel
 i Faculty Excellence Professor of Mechanical and Aerospace Engineering at 
 the University of California\, Irvine. He obtained his Engineering Diploma
  in Aeronautics from Universidad Nacional de La Plata in 2001. In 2004 he 
 moved to the United States to pursue graduate studies at Caltech\, receivi
 ng his M.Sc. and Ph.D. in Aeronautics in 2005 and 2009 respectively. Upon 
 graduation Dr. Rimoli accepted a postdoctoral associate position at the De
 partment of Aeronautics and Astronautics of MIT\, where he performed resea
 rch for over a year and a half. He joined Georgia Tech in 2011\, where unt
 il recently he was the Pratt & Whitney Professor of Aerospace Engineering.
  His research interests lie within the broad field of computational mechan
 ics of materials and structures\, with special interest in problems involv
 ing multiple length and time scales\, and in the development of theories a
 nd computational techniques for seamlessly bridging them. He is an Associa
 te Fellow of AIAA\, and is the recipient of the NSF CAREER Award\, the Don
 ald W. Douglas Prize Fellowship\, the Ernest E. Sechler Memorial Award in 
 Aeronautics\, the James Clerk Maxwell Young Writers Prize\, the Lockheed D
 ean's Award for Excellence in Teaching\, the Class of 1940 Teaching Effect
 iveness Award\, and the Goizueta Junior Faculty Professorship.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418 https://epf
 l.zoom.us/j/64230566011
STATUS:CONFIRMED
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