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SUMMARY:Student seminar - Effect of Prestress on the Bistability of Deploy
 able Hinges\, and  Design of optimized reinforced concrete floor grillages
  - James Whitely and Tara Venkatadri\, University of Cambridge
DTSTART:20230518T140000Z
DTEND:20230518T150000Z
UID:TALK200611@talks.cam.ac.uk
CONTACT:Jamie Clarkson
DESCRIPTION:Speaker: Tara Venkatadri\n\nTitle: Effect of Prestress on the 
 Bistability of Deployable Hinges\n\nAbstract:\n\nBistable hinges are struc
 tures that can be snapped between two stable states\, often harnessing a m
 echanical instability such as buckling\, by the application of a transient
  load.  This study examined two geometries of bistable hinges: a bending h
 inge based on the von Mises truss\, and a twisting hinge with two plates c
 onnected by angled rods.  Prestress was introduced into these structures t
 hrough a combination of 3D-printed prototypes\, mathematical theory\, and 
 finite element models\, and its effect on stability was characterized.  It
  was found that prestress may be used to tune the range of displacement or
  rotation between the two stable states\, but that too much prestress woul
 d suppress bistability.  The results from this study may be applied in the
  future to create lightweight deployment systems for large spacecraft stru
 ctures.\n\n\nSpeaker:James Whiteley\n\nTitle: Design of optimized reinforc
 ed concrete floor grillages\n\nAbstract:\n\nA new lightweight reinforced c
 oncrete beam grillage floor is proposed\, whose topology is found via nume
 rical layout optimization. The depths and reinforcement of downstand beams
  are tailored to local strength requirements\, and material savings relati
 ve to single-bay flat slabs of 40-50% were calculated. Parametric studies 
 were conducted on multi-bay floorplates\, finding that optimal grillage vo
 lumes could be decreased by approximately 50% by changing the locations of
  supporting columns. The system presents challenges in terms of architectu
 ral design and fabrication\, which could be the subject of future work.\n\
 n\nJoin Zoom Meeting\nhttps://eng-cam.zoom.us/j/83729338532 \n\nMeeting ID
 : 837 2933 8532\n\n
LOCATION:CivEng Seminar Room (1-33) (Civil Engineering Building)
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