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UID:0-472@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20160608T163000

DTEND;TZID=Asia/Jerusalem:20160608T173000

DTSTAMP:20230603T191320Z

URL:https://aerospace.technion.ac.il/events/topological-interlocking-a-pro
 mising-materials-design-principle/

SUMMARY:Topological Interlocking: A Promising Materials Design Principle
DESCRIPTION:Lecturer:Yuri Estrin\n Faculty:Monash University\, Melbourne\, 
 Australia and\n Institute:National University of Science and Technology (N
 UST) MISiS\, Moscow\, Russia\n Location:Classroom 165\, ground floor\, Lib
 rary\, Aerospace Eng.\n Zoom: \n Abstract: \n Details: \n We present a nov
 el approach to designing materials using the topological interlocking prin
 ciple. Segmentation of monolithic materials into identical interlocked bui
 lding blocks provides the structure with enhanced resistance to crack prop
 agation\, high tolerance to local failures\, increased sound insulation ca
 pacity and other beneficial properties [1]. In addition\, different materi
 als can be blended within such a structure in any pattern and proportion\,
  which may provide it with multifunctionality. A further advantageous prop
 erty of topologically interlocked ensembles of blocks is the possibility t
 o control the stiffness of the assembly. By including in the structure act
 ive elements that possess shape memory\, actuation becomes possible in tha
 t a precipitous change of stiffness can be produced. This will be illustra
 ted by an assembly of osteomorphic ceramic blocks armoured with tensioning
  wires from a shape memory alloy (Nitinol). The constraining force imposed
  on the assembly through the wires governs its bending stiffness and load 
 bearing capacity. Such a segmented plate can act as a smart structure\, wh
 ich changes its flexural stiffness and load bearing capacity “on demand
 ”\, in response to external stimuli\, such as heat generated by the swit
 ching an electric current on and off [2]. In another example\, platelets o
 f ultra-high molecular weight polyethylene (UHMWPE) embedded in an assembl
 y of ceramic osteomorphic blocks were used for actuation. This polymer pos
 sesses a large shape memory effect [3]. Heating of the platelets by passin
 g an electric current was shown to produce a response of the structure by 
 stiffening and load increment. The use of biomimetic principles in the des
 ign of topological interlocking structures will also be discussed.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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